This part allows you to adjust the z axis of the longer B1 Laser.
Use two brass threaded inserts that are m4xH10 the lower one should have the threads drilled out it is just to keep the screw from wobbling. The laser head wobbles a bit when focused further away from the bed but it has not impacted any of my engravings. It's a trade off between smooth focusing and wobble. To get rid of the wobble the jig fits too tight. it is much better than that knurled screw that comes stock.
Add supports just under the two wings formed by the square pad that has fillets. Only there.
The author marked this model as their own original creation.