For those of you with access to a Touch tool (Height gauge) with an R8 (0.75") shaft and would like to level your taz 4 bed with precision (accurate to within .001") attached is my .STL file and images for a compression fit rail mount that will hold the device.
Note: your X Axis rails must be level for this to work properly.
For anybody looking to make their own:
The X Axis rails are 80mm apart from top to bottom (Center of each circle 70mm apart)
Each tube is 10mm thick
level device.stl (101 KB)