i bought the sparco techno shift knob when i first bought the car, then i bought the kartboy short shifter a little later. the knob fit snug for awhile, but then it became rediculously loose so i took it off. it came with the plastic inserts and the screws. problem is, i can't use the screws because the shifter is too short to tighten them and the plastic insert doesn't do the job. what can do to keep that s*** tight. thanks.