This is a adapter from de Logitech shifter to an m10x1.5 thread, alowing to use for instance a Honda shiftknob. I used a shiftknob i had laying around in the garage which gives a bit more weight to it. 

It also extends the shiftknob for 30mm, which gives a better throw. 

Please use enough infill for the piece to be strong enough to hande the abuse.