I want to try the new Rupes DA system both the pads and the polish. I have a Porter Cable 7424XP that I purchased several years ago. I threw away all my old pads and polishes this fall. Some of the polish was dried up and I had used the pads multiple times. Question is can I use the Rupes pads with my velco loop backing plate for my Porter Cable or will I need something else to attach the pads?