Laser collimator adjusting rig

I had troubles with my laser collimation unit and wanted to check if it is "collimated". So I created that small rig which can be placed on a tripod. Bearings are small 623 fixed with M3 screws. But you can also use it without them.
Go as far away as you can from a flat surface and adjust with an Alankey the position of the laser in the collimator housing until the laserdot does not move when you turn the collimator on the rig.

ATTENTION: Take care that no human or animal is in front of the unit to avoid eye damages!

I hope it helps someone!