Hi Gang;
Here's a little gadget that simplifies the process of lining up a glass tube and/or aligning the mirrors. Typically, you would spend a lot of time pulsing the laser , adjusting a mirror, and continually repeating the process until you get things all lines up- a tedious procedure.
This is nothing more than a PVC plumbing fitting, bored on one end to fit snugly over the end of a glass laser tube, and with a disc inserted on the other end and bored for a red dot laser (found on ebay and other sources for about $4). The laser is connected to either a set of DC batteries or, in this case, to a 6 volt phone charger. Put in on the tube, turn it on, and make any adjustments to line things up.
In addition, measure the diameter of your lens holders and make up some circular 1/4 discs to fit them and glue stick some circular 1" matboard targets to them-easy to pull off and change to a new one when pulsing with the actual laser.
Best Regards,
George
Laserarts