Ok I have a Kartboy shifter and it pretty much sucks. It's way too loose theres seems to be a gap between the linkage and the shifter and it vibrates loudly at higher rpms. I originally torqued it down all the way tightly and I may have bent the linkage somewhat, I'm not sure, it just kept on loosening up eventually anyways. It just shifts really bad, it's very notchy and I know there are little metal shavings in there, I am going to take a look inside again to see how bad it is. Is the STI short shifter the linkage and the shifter? How hard would that one be to install? Do we have any other choices for shifters? Everyone who drives it really doesn't like it, i've grinded by accident a couple of times because of it. When I shift from 1st to 2nd, it goes into gear and the shifter can even go down some more its because it's so loose and can rotate some on the pin. Any ideas?