MPCNC - Top Plate for Tall Corners with Mech Limit Switch Mounts for US & IE Version

**Rev8 Update**
I changed the wire covers a little & made a zip tie connection on the side for the limit swtich wires to route easier.

This plate adds a way to put mechanical limit switches on top of the corners. The Y-Limit switch was too far above plate to hit the roller, so I remixed the roller lock to add a surface for the switch to hit. The plate is the same for both US & IE versions & I made a roller lock part for both versions.

This works with: http://www.thingiverse.com/thing:14