Alright I woke up this morning on a mission to do a bunch of testing to try and figure out why my laser is flickering. The first thing I did was check the wires connected to the tube just to make sure there was not something loose. There wasn’t. I then decided to do another test to watch the tube and see if there is any arcing visible. I drew another large box and set it to constant power and slow speed and ran it. And guess what? The beam was solid with no flickering at all. Go figure! I ran more tests. Every test I ran it looked great. As much as that should make me happy, it kind of concerns me that maybe there is an intermittent problem which will be harder to diagnose and get fixed. But at this point I need to move forward and get back to the original issue that led me to finding the flickering laser.
I will keep an eye on the laser and if I have any further info to add I will. Also if anyone has any suggestions or tests I can do to determine if the PS or laser tube is bad or faulty I would welcome them.
I think I am going to go post my other issue, regarding the dots/serrated/jagged edges, in my post where we previously worked through the problem and thought we had it figured out.
For those that are interested here is the POST
BTW, I reached out to the seller to discuss getting the PS/tube warrantied, and guess what? CRICKETS!
As expected 
Thanks everyone for your help!