Well, I had to do it. 20 years ago I shelled out about a king's ransom for a large Helium Neon laser display. Came with a controller with safety key and four control dials.
The laser module houses a 1.5 foot metal tube containing the laser and three motorised mirror units which utilised single-side laser mirrors. I need to fix a fault with the motors but I removed them intact and am going to recondition the mirror module for use with the Wicked Lasers.

You can see some early tests here after I linked a couple of AA batteries to one of the existing motors. I lit an incense candle to enable the beam to be seen more easily on the camera. The laser in the first set of images is a <25mW from Wicked Lasers. I'll add pictures of the NEXUS with this contraption as soon as I can get it all up and running without as many safety concerns.