I run Pagid RS29 and have the same problem. I first thought it was a mistake on Pagids part that they got the backing plate dimensions wrong. But it's the same on both front and rear pads. And I read somewhere that they are made slightly to small to prevent getting stuck when expanding due to heat.
PS: Do you mean you are running PFC08? Or FCP??
PPS: I get really strange looks from people on the street when the car does this loud knocking sound
