I've just bought a KCNC Pro Road 34.9mm Seat Clamp for my Taurine 07 Team frame. Having removed the OEM clamp with plastic shim thing, the KCNC sits snuggly with out th shim in place, but when tightening to 5n/mm the diagonal slot is pratcially fully closed. The post feels like it is held pretty tight, but I just wanted to check that it won't damage the frame or post (Ritchey Super Logic Carbon)? Anyone got any views?

Does anyone know what the shim is for on the OEM clamp?

thanks in advance