Mark

if you happen to own a gage block set, this is the moment to get it!

overall not very impressed with the control box and the wire routing and the size and location of the box.

Also the dust protection seems inadequate

align with the slot and push in,

then unscrew completely while applying pressure to the part and tighten again,

this will properly turn and tighten the drop in T-nuits

or extra shims on the bolt head side

i think 12mm bolts would be a better fit

so i just found out that if you unscrew the bolts with the drop in t-nuts all the way, and then tighten again, they'll naturally flip and engage perfectly and almost 100% of the time. so if you just place the assembly and then press it against the x-axis while unscrewing one of the bolts and then retightening, then you can let it go and do the rest.

i'd say, first tighten the grub screw to make sure the flat is perfectly plumb to it. then loosen again in order to tighten the clamping bolt and thereafter retighten the grub screw.

don't put them on the wrong side even though there is a clear picture, even really smart people can still get it wrong.

the 14mm seems a bit short, the screw doesn't reach the middle of the coupler

I made a loop of the wire and put the cable tie through, doubling the cable for some clamping and the loop holds it taut as well