I already had an older model Porter Cable 7424 and a FLEX 3401, but I like smaller pads, so I had the backing plate for the FLEX cut down to accommodate 5 1/2" pads. But I still needed something smaller. I thought about the Griot's 3", but didn't like the idea of buying a 3rd polisher.
Searching around on AGO, I saw a version of this solution for 4" pads, so I decided to try to duplicate it with 3" pads.
Here's what I came up with:
It is composed of the following:
3 Inch Flex-Foam HD Rotary Backing Plate
D.A Adapter 5/8 Inch X 11
3 Inch Meguiar's DA Microfiber Cutting Disc (2 Pack)
The set-up works great for me on bumpers, pillars and the vent area on the only Porsche I have done.