I have made this ,,shortshifter" because I did not like how high the end of the shifter was.

The top of the shiftknob is basically 2mm away from the top of the shifters shaft, so for me it made the shifting experience better.

You need to just remove the old shift knob and then slide on the new one, I made the fit tight, so installing needs a bit of force, but in the end, it will sit perfectly without moving :D