40W CO2 Laser Tube Adjustable Holder for JK-K3020

This holder can adjust the 40W CO2 laser tube up/down & right/left for model JK-K3020.

How to Assemble, please see blow my blog. (Japanese)
https://martyworkshopdiary.blogspot.com/2019/01/co2-07.html

And How to Adjust please see blow my blog.(Japanese)
My adjustment method is not normal.
I adjust from the lense-side using the laser pointer.
https://martyworkshopdiary.blogspot.com/2019/02/co2-08.html

Selphb's "thing: 420829" was very helpful.
Thank very much.