Slider Insert pr - Mi4CX-Mi5evo

After extensive testing we have updated the Mi4CX, Mi5 and Mi5evo diff and spool sliders.

The sliders are made from a new improved material which is harder wearing and has improved slip characteristics.

PTFE Coated. Longer lasting and less rebuilds #Result!!

Fits: Mi4CXL, Mi5, Mi5 evo