Making the standard K40 laser head fully adjustable

I came across this YouTube site showing how to make the standard K40 head adjustable… height, angle etc.
You replace the existing brass supports for the head plate with 3mm bolts and nuts… makes everything adjustable, so simple I never thought about it!
Works perfectly, I now have the beam hitting dead centre on mirror 3 (replaced the mirror with a card circle to test and adjust) and now hitting the lens dead centre and vertical.