I am having a problem with my J Tech laser and I do not know if it's an OpenBuilds, J Tech or Lightburn problem. No matter what I increase the speed the laser goes the same slow speed. I did 4 videos using the same 9" line file. All speeds are in inch/min. The burns were made at 70,137,200 and 223 and all are within a couple of seconds of each other. Around 28 seconds. The X belt is tight and I am at a loss as to what is going on. Forgot to say this is on a Inventables X-carve 1000.