Flex vs. BOSS vs Rupes: Im not seeing something here..

S

SwedishRider

New member
I'm trying to understand the more expensive tools that detailers use. Ignoring rotary polishers for the purposes of this thread, many detailers seem to gravitate to the Flex 3401, BOSS 15 or 21, or a Rupes 15 or 21. I understand that the BOSS and Rupes are long throw DA machines, and I also understand the Flex 3401 is a forced rotation machine that keeps spinning the pad when the others would stall out. I understand the concepts surrounding DA machines vs forced rotation machines as well.

But given the prices of those units are in the same ballpark, why would anyone prefer a BOSS or Rupes over a Flex? Given the forced rotation of the Flex, wouldn't it be the superior tool over the other options around its price point? Maybe I'm missing something here, but I don't understand the value of each of these tools compared each other given the correction power of a Flex. Does anyone have an explanation as to the arguments for or against these tools? Thanks. :)
 
Re: Flex vs. BOSS vs Rupes: I'm not seeing something here..

SwedishRider- I haven't used the other two, but as a Flex 3401 user I can say that it doesn't always finish out as well as I want, so I have to do a final polish with something else. No, I doubt that anybody else would ever notice the diff,but hey...this is Autopia.
 
Re: Flex vs. BOSS vs Rupes: I'm not seeing something here..

I think it comes down to comfort too. I am a 3401 user but to be honest the vibrations and the fact it gets hot has started to wear on me. I may buy a G21 but for now my Makita rotary has been called into action and works smooth and fast.
 
Re: Flex vs. BOSS vs Rupes: I'm not seeing something here..

I've read quite a few reviews that praise the BOSS 15 and 21 for their comfort and power (and warranty), but they are still not forced rotation like a Flex 3401. I would think the Flex would "walk" much more than a BOSS, but would give more correction. The BOSS may finish better because of the lack of forced rotation though. I guess it depends if you need the forced rotation or not.
 
Re: Flex vs. BOSS vs Rupes: I'm not seeing something here..

Justins00ss said:
I think it comes down to comfort too. I am a 3401 user but to be honest the vibrations and the fact it gets hot has started to wear on me. I may buy a G21 but for now my Makita rotary has been called into action and works smooth and fast.
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I have had a 3401 for a few years now and I will tell you that using it for extended periods is a workout. I am doing a lot more paint corrections these days and am contemplating purchasing the Rupes or the Griots 21. From what I understand, they do a great job of correcting while being much easier to control and physically easier on the body.
 
Re: Flex vs. BOSS vs Rupes: I'm not seeing something here..

The key with the 3401 is to use softer cutting pads like the pink pads from lake country. As far as which is better? On jet black paint the Rupes type polishers are superior the way they finish. And here is another trick for the Rupes users - if the machine slows or stops in those common areas, move the polisher fast like the old school rotary guys. It keeps spinning and actually cuts maybe even better.
 
Re: Flex vs. BOSS vs Rupes: I'm not seeing something here..

I can't compare the long throw polishers to a Flex, but polishing with my G15 is a real pleasure compared to my GG6 ( I don't have any real complaints) and it gets the job done in half the time. The ability to polish with little to no pressure and the lack of significant vibration is outstanding IMO.
 
Re: Flex vs. BOSS vs Rupes: I'm not seeing something here..

I love my 3401... Beast of a machine but a full compound and polish job will wear you out. I havent used a rupes or a boss for comparison.

i just got a 3403 and im looking forward to learning to use it, though opportunities will be limited
 
Re: Flex vs. BOSS vs Rupes: I'm not seeing something here..

jrock645 said:
I love my 3401... Beast of a machine but a full compound and polish job will wear you out. I havent used a rupes or a boss for comparison.

i just got a 3403 and im looking forward to learning to use it, though opportunities will be limited
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How old are you? It wears you out? What are you doing with it? Wrestle? :)
 
Re: Flex vs. BOSS vs Rupes: I'm not seeing something here..

Thomas Dekany said:
How old are you? It wears you out? What are you doing with it? Wrestle? :)
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bswombaugh said:
I have had a 3401 for a few years now and I will tell you that using it for extended periods is a workout. I am doing a lot more paint corrections these days and am contemplating purchasing the Rupes or the Griots 21. From what I understand, they do a great job of correcting while being much easier to control and physically easier on the body.
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I agree with wombaugh. One of the main reasons I bought a 21es is because of how exhausted I would be after long buffing hours. Don't get me wrong I love the Flex. It cuts well, finishes pretty good, and is built very well. But if I had to choose one it would be the Rupes.
 
Re: Flex vs. BOSS vs Rupes: I'm not seeing something here..

I didn't care for the noise of the Flex, the counter clockwise rotation, and I could never get a comfortable position with it. If you can, see if there are any forum members close to you and if you could try some machines before you buy.
 
Re: Flex vs. BOSS vs Rupes: I'm not seeing something here..

I have been using my Rupes 15 mostly instead of my Flex since I do not do that much correction. When doing my daily driver recently I decided to do a side by side evaluation using the same polish and pad (just moved pad between machines).

The Flex is heavier and notice a difference on vertical panels. Due the weight, I noticed I needed to insure I have good body position (polisher has to mostly stay in front of you to minimize the stress on my arms. The Rupes is more forgiving on vertical areas. It was primary of the mid and lower panels areas since you have to decide to sit on the ground, rest on your knees, or use the rolling chair. The upper surfaces are fine with the flex. For both, the long body is more of a factor in handling on lower sections since I like to hold with the tail at the 4 o'clock position.

I am sure others with a lot more experience may do it better.
 
Re: Flex vs. BOSS vs Rupes: I'm not seeing something here..

I haven't touched my 3401 since I purchased the 15 and now the 21.
I'm hanging onto it for now but once I prove that the Rupes can handle side panel corrections, it's going off to EBay.
I have a Makita if I have any problems after that.

It's cool how the 3401 sounds and ramps up if you want to show off a bit. But you can't beat the smoothness and balance of the Rupes.. so much easier on me.

Maybe I'll be generous at Christmas.
 
Re: Flex vs. BOSS vs Rupes: I'm not seeing something here..

My flex required more effort to use that the rupes. When I pull the flex out after using the rupes it's amazing the difference in effort to keep the machine where you want it. The rupes requires on slight guidance where the flex needs to me moved where you want it. Tough to explain but it how it feels to me. I also can finish out better with my rupes or gg6 than I can with my flex on darker color cars. I will try the lighter cutting pads as now I am using orange.

Thomas Dekany said:
How old are you? It wears you out? What are you doing with it? Wrestle? :)
Click to expand...
 
Re: Flex vs. BOSS vs Rupes: I'm not seeing something here..

When you all say rupes can you substitute the G15 or 21 in terms of finishing and ease of use compared to flex? I've been eying a G21 with 5" plate for a while but yet to pull the trigger. The Flex is a monster but I just did a Surburban and my body is feeling it.
 
Re: Flex vs. BOSS vs Rupes: I'm not seeing something here..

Medicscott said:
When you all say rupes can you substitute the G15 or 21 in terms of finishing and ease of use compared to flex? I've been eying a G21 with 5" plate for a while but yet to pull the trigger. The Flex is a monster but I just did a Surburban and my body is feeling it.
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The G15 comes with a 5" backing plate and is the recommended machine for enthusiasts and detailers. The G21 comes with a 6" backing plate and is recommended for professional detailers.

Aside from the 6mm of throw, is there a case for a G15 or a G21 (possibly with a smaller 5" backing plate) for particular types of users. In other words, would an enthusiast be well advised to spend the extra $20 for the G21 over the G15 and get a 5" backing plate for it? Or is the G15 the better machine for home users?
 
Re: Flex vs. BOSS vs Rupes: I'm not seeing something here..

Start using the pink cutting pads and you'll be able to control it effortlessly
 
Re: Flex vs. BOSS vs Rupes: I'm not seeing something here..

SwedishRider said:
The G15 comes with a 5" backing plate and is the recommended machine for enthusiasts and detailers. The G21 comes with a 6" backing plate and is recommended for professional detailers.

Aside from the 6mm of throw, is there a case for a G15 or a G21 (possibly with a smaller 5" backing plate) for particular types of users. In other words, would an enthusiast be well advised to spend the extra $20 for the G21 over the G15 and get a 5" backing plate for it? Or is the G15 the better machine for home users?
Click to expand...

I would like to know if anyone that has the 15 and the 21 could tell us if there is a marked difference in correction ability between the two machines.
 
Re: Flex vs. BOSS vs Rupes: I'm not seeing something here..

I have the 15, 21, 3401, G21,etc. Pm me your number, I'll be more then happy to explain each in depth. Typing that much will give me carple tunnel.
 
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