Groove Effector for Delta Printers

I had the idea of designing this effector after seeing one published by Boofly at this link: http://www.thingiverse.com/thing:520580.
In my version you can disassemble the extruder without having to break up the printer as happened to me with the effector that came to my printer.
The only thing to take into account and the triggering of the order Zmin limit switch for the leveling of the floor that must be soldered on pin NO because in this version of trigger is reversed, ie at the moment that