I have the partial leather Recaro's and the driver side is developing a very annoying popping sound. When I depress the clutch, I hear a loud pop under my thigh at the end of the seat it feels like. Doesn't happen every shift. Usually while braking and/or turning. I've seen a few threads on rattling seats (passenger side rattles with no weight) or shifting seats, but I don't think I've come across a solution for the seat pop. Has anyone else seen this and fixed it? It's starting to drive me up a wall.