Tramming Blocks for Longer LK5 Pro with Dual Z Axis mod

I added a second z screw and motor to my Longer LK5 Pro hoping to get better stability on tall prints. 

As a side effect the X gantry needs constant tramming. This would not be a big deal if we had individual motor controllers. In this case, we don't. It falls out of sync when the power is turned off and the holding current is no longer present. 

I found https://www.thingiverse.com/thing:3848473 and was inspired to make a similar part for the LK5.  My X gantry is 40mm from the bottom of the frame when at max height (400mm) so that is the height of the blocks. 

They can be installed on the bottom of the frame or on top of the X gantry. They are a tight fit but that is good.