I finally got to use the Flex today for my winter detail. Because I have to work outside (no garage) and it's November in New England, finding a nice day to polish can be a challenge, but the weather cooperated nicely today with temps in the high 50s. It was windy, and the trees are still shedding all sorts of stuff, so it was a battle keeping the car contaminant free while polishing, but I did OK.
I was trying both the Flex and the
Menzerna polishes (SIP and 106FF) for the first time today. I started with 106 on an Erasure white pad, but that didn't get the marring out. Moved up to an Erasure orange pad which was better, but still needed a step up. Ended up using SIP on the orange pad for the hood, roof, and trunk followed by 106FF. All the other areas got 106FF on a white pad.
The Flex is a great machine. I never found the vibrations to be much of an issue nor the weight of the machine. I really appreciated the front handle for control and to be able to apply pressure as needed. While the sound is loud, it's not annoying like the PC. More of a low rumble that gives you an audible clue that this thing means business! And I now understand what you guys said about positioning the tail of the polisher to make it move in the direction you want it to. I did end up fighting it some, but overall the forced rotation is very manageable. I was even able to one-hand it for the hard-to-reach areas on the hood and roof ... with the Flex on 5. I never did go above 5.
At first, I used 2 to spread the polish. But hey, the thing has a trigger, so after a while, I kept the speed dial on 5 and used the trigger to spread the polish and bring the Flex up to speed. More tricky that way obviously because your finger pressure on the trigger can vary. Next time, I may go back to simply using the different settings on the speed dial. I did find a few times that my finger missed the trigger latch, but I attribute that to operator error and unfamiliarity with the machine.
I used the 6" backing plate that came with it (the red velcro one). The velcro didn't separate from the edge like it has on some, but I now have a blackened ring of velcro around the BP screw. Has this happened to anyone else? It left a nice black ring on the backing of the Erasure white pad (which was my main pad for this detail). Not sure what that is all about.
All marring is gone. Yippee! I never was able to get rid of it with the PC (OC and OP), but I was with the Flex and the Menzerna polishes. And I found applying the LSP (845IW) to be real easy with the Flex on 1 ... just about as easy as the PC. I'd get rid of my PC, but then I'd not be able to do spot corrections with a 4" pad.
Bottom line ... well pleased with the purchase.

I still need to play around more with the polishes, but the Flex does its job and does it well. All I need to do is figure out what happened to the BP. I really didn't apply much pressure.
No pics ... no digital camera, and it was dark when I finished. That $40 that I spent at Lowe's last night for a 1000W halogen light stand was well worth it.