CJ - everyone knows it's Mopar or No-car!
But to original poster - have you already been working with a "starter" DA like the PC or Megs units? Might consider if not, starting with the PC, get your technique perfected, then jump to a flex / rupes.
CJ would prob endorse this approach - I think? You converted your PC to a 3in plate after getting your flex, right?
Mopar!!! BLASPHEMY!!!! Matt curses for even saying MOPAR!!! Ford and Chevy OK?!!!!...LOL
You are correct at least that is what I did. I started with the PC7424XP and after spending 22HRS on my buddies Shelby I needed to look for a better way of reducing time.
This forum is the reason why I went Flex. It was an easy decision for me as the Flex is about $100 less than the Rupes Big Foot. Also it was the only "forced rotation" DA.
Learning how to use the Flex was very easy. I thought it was going to be hard but it wasn't. You learned how to control the "walking" pretty easy.
Recently, I worked on a Honda Accord and it needed a full correction. I used the Flex and was able to finish the job in about 4 hours. Exterior only and I do not tape which save quite a bit of time. I use the 6.5" Hybrids FG400 and SF4500 and Powerlock for a sealant.
It was Mike (Dedicated Perfection) and Mike Phillips that suggested the Hybrid Pads. I already had all the BP for the Flex. But once I tried the Lake Country Hybrid Pads I could not believe how much more easier the Flex was to use. Even better control (this is where the finesse part comes in).
As for my PC7424XP I still use it. It has the 3" Pads for waxing. I will use it to on other things, however, they are minor compared to the Flex.
BTW, the Hellcat Challenger is one BAD AZZ Ride so I guess Mopar is OK....LOL

rops:
Have a good one Bud!!
Here are a couple of Pic for the Honda I was talking about. This was Nov 2014.