X3D Rear Proximity Sensor Mount

I made the small X3D printer cause I needed a small solution that could travel with me.
Because of how the bed leans from weight and using one belt or lead screw I needed a better way of doing leveling so I made this mount in order to attach a proximity sensor. I designed this originally for a 12mm sensor but can adapt to any size.

One negative thing I've noticed with mounting in the rear, reduces your Y travel (you can hit the sensor into the bed guide rails.
Probably later on I'll think u