55mm Laser Tube Alignment

I've seen a few different methods on mirror alignment for Co2 laser engravers. This one is for a 55mm Laser Tube using a 3-5V focusable red Laser found on amazon.

https://www.amazon.com/gp/product/B01CH53Y08/ref=oh_aui_detailpage_o08_s00?ie=UTF8&psc=1

I got tired of the going to the back of the machine, align, back to the front, fire, back and forth for what seemed like hours after upgrading from my 50w to a 60w tube.

Using a constant "on" red laser dot i'm able to do adjustments on the