Another backlash reducer for Overlord / Overlord Pro

Having made and install Pawpawpaw85's [backlash reducer](http://www.thingiverse.com/thing:892858) on my printer I notice a real enhancement of the printing's quality !

But I also notice some troubles :
* the spring unhooked to easily,
* the part that lock the device at the end of the printer's arm is too big and hinder printer's moves,
* the support needed to print the hook for the spring is difficult to remove.

So I design my own from scratch whit a minimalistic anchor to the end of th