I've switched over to using the Megs MF system almost exclusively now for compounding, and picked up the 3" pads and the megs 3" backing plate for tight spots, pillars, etc. I'm slightly confused about the adapter system though. I have my GGDA set up with the 5" backing plate for the 5.5" cutting discs and foam pads to finish, so I'm putting the 3" system on my PC for quick transition. On the PC, I've found I can just use one of the adapters to directly connect the bp to the pc, but I've heard other people saying they've had to use the little extension as well. For you guys who use this system, how do you have it set up? Any pics of your setup would be appreciated too. Thanks.