wind-up Bathtub Boat V5 modified wind-up elements

I modified the xl version of the wind-up knob (aufzieherxl_pla.stl) and the driver (mitnehmer_pla.stl) of the original wind-up Bathtub Boat v5 because the knob kept slipping out. The shaft the knob is sitting on is now longer and it just feels and handles much better.