Sculpfun S9 height adjuster

I want to make a height adjuster for my Sculpfun S9. I was inspired by the similar thing made by seabirdhh https://www.thingiverse.com/thing:4726428.
You will need additionally:
- 2 M4 bolts for fixing the laserhead to the slider
- M6 threated rod cutted to 20-22 cm long
- 1 self locking M6 nut
- 1 M3x16-18 bolt for fixing knob
- 1 furniture barrel nut (M6)
- 4 M4 nuts and 2 or 4 short M4 bolts ( for the rest can used the original fixing bolt used for height adjustment) for mounting the back of the adjuster to the gantry,

If the two main parts are too tight for an easy sliding, the back part could be printed with an 100.5-101 % upscale.