Lulzbot TAZ no tool dial gauge mount

I was looking for a system that doesn't need tool or changing the toolhead to quickly mount a dial gauge, to set up the bed of my TAZ 5.

I designed this thing to snap on the extruder idler, and its fixed with the latch. Just remove filament before.

It was designed to fit to the latest idler available in this service bulletin : https://www.lulzbot.com/sites/default/files/extruder_idler_service_bulletin.pdf

My toolhead is a TAZ 6 style ugrade (https://www.printyourmind3d.ca/blogs/tutorial