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. K40 - Head - Adjustment Screws - YouTube
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.