For my 1st ever machine, I went with the PC. Once I get a little more time on it I may move up to the Flex. I used Mike's video on here:
Car Buffers, Car Polishers, Rotary Polishers, polishing foam pads, buffing pads, wool pad, Porter Cable 7424, Makita, DeWalt, Cyclo buffer, bonnet,
to help me...