
So I went to Lowes and got a Porter Cable 7336SP for $109. After being a lurker on this forum for quite some time, and doing detailing by hand, I decided to save my workout for the gym and get a Porter Cable to tackle the swirls

Immediate Plans: I'm gonna order the 6" Velcro Backup Plate from CMA, as advised from 4DSC's Definitive Guide to PC thread. Going to buy yellow, white and grey/black pads from CMA as well.
Quick question though. I noticed that people use ".5" on their machines, such as 3.5, 4.5, 5.5 and so on. However when I was rolling the dial, it wouldn't stay at a position I assumed would be between numbers? Instead there's a click right after a number, or right before and on the number. So let's say if I was at 4, I would feel a click at 3.8, 4, 4.2 - assuming the .2 difference is the relative distance from 4. Sorry if this is confusing, but I was wondering if that's normal?
It's too bad that the PC doesn't come with a velcro backing plate included. The yellow and white foam pads just stick onto the velcro? I guess until I try it, it's kinda hard to believe that it'll stick securely to the velcro...
Oh, and is there a big difference between the CMA backing plate versus Top of the Line? There's a notable $6 difference that would help a lot.
Anyway, I'm excited to start using the PC and thanks for your answers!