SmartrapCore 1.0 enstop Y extensions

These two simple pieces will help resolving some endstop problems you might experience on your SmartrapCore's Y axis :

- the big part is the step motor support. I modified it to make sure the endstop component will "click" easily when reaching home on the Y axis.
- the smaller part is meant to be added on the left slide-Y part, as an extension to support the endstop component, so that it will reach home sooner, as well as be held more firmly (on the original piece the plastic was a bit fragile on my printer). With this, not only the 0 on Y axis will be further away than in the original assembly, but it will also prevent the hot end to hit the clip you might have used to maintain the glass plate on your print bed (at least that's why I made it for my printer).

It works pretty fine with the Z-axis support extension : http://www.thingiverse.com/thing:774743 ;)