plus, i bought the pc 7336 sp, it didnt come with velco plate, i measured the size of the back plate, it's almost 6". and the only available velco plate size is 5" here. is it ok have 6"back plate with 5" velco plate?
You're going to need to take the PantsSaver mat off first, and then you're going to have to use some cleaner and a vaccum extractor on that I imagine. It's pretty bad looking.
Yes, it's okay to use a 5" velcro plate if you can find one that fits the PC shaft. Sift through my PC thread in my sig to see some options and what you need to know.