So, while I was banging out my car with the MKII, some more thoughts:
1. I noticed the new machine seems much more powerful. I have old Rupes pads, and I noticed if you bear down on them - little pieces of foam (just a few tiny pieces) would fly off the pad. This didn't happen with the old machine
This isn't a slam on the pads (they are old - and it's very minor), this is a testament to how the new machine can muscle through concave and awkward surfaces. That's when I noticed it.
2. I noticed the new machine doesn't seem much different from the old machine - until you crank it up to 5 or greater - after that, you can really feel the difference. On the lower speeds, it can still stall.
3. This is total speculation, but the new machines BP seems different - if I'm remembering the old BP correctly. The new machine has a solid plastic core/center to the BP. This seems to transmit the power better. Again, I could be remembering the old BP incorrectly - but the new BP seems to transmit the power down better.
4. As a comparison, I'd rate the new MKII as a little less powerful than the all powerful GG6. Pretty amazing it does it with a 500w motor. They did something to this motor to really amp it up.
5. The washer mod will now just be a foot note in history. It has no real purpose with the new machine.
6. The new rubber cord is really nice. No memory to it. However, because it's rubber - it seems "softer"; like it could be easier to damage it by rolling over it with something. So, be careful.
7. The packaging of the new polisher isn't significantly different. But you get 2 "Bigfoot" decals now.
8. The motor sounds different on he new machine. I can't put my finger on it, sounds lower pitched or more of a power grunt. Doesn't seem any quieter though.
9. While the machine is more powerful, and the "amp up" provided by adding more downward force to the polisher seems stronger - I noticed no heat from the machine whatsoever. I wasn't doing crazy compounding with MF pads; but the machine just remained ice cold.
This is a likely a testament to using a more efficient motor, and not just bumping up he wattage to get more power. This is why I see Rupes as innovators and others as copiers.
Conclusion, is is worth the upgrade if you have a MKI????
So, the deal here is - Rupes really did improve this tool. They didn't just slap some different rubber grips on, modify the plastic case, and call it a new generation tool.
While the tool is more powerful, it does feel really similar,to the old tool. The stalling issue he old tool occasionally had on certain surfaces is almost eliminated, as is a need for a washer mod. The main benefits / differences of the new tool IMHO are:
1. More power
2. Better cord (compared to early Mk I tools)
3. Ability to balance it on its spine with rubber strip on back.
Using the new machine, I would never want to go back to the old. Considering the old machine still probable can be sold for a decent price, I think the upgrade is worth it for most users. I sold my old machine on eBay for I think around $275.
****please support trans-species humans.