I just bought new fins and i put them in but one of them is a little loose (wobbly), not because of the screw but because of the size of the fin compared to the fin slot. Does anybody know a way to hold it in place better?
Some if not most surf shops carry a heavy duty polyethelene film product specifically for this shimming, it wraps both the sides and the bottom of the fin. Or only one side if that is all that is required. This problem is inherent in longboard fins as there are different boxes and the fins have greater surface to box area. Most shops I have seen will simply give the film away if you need it.