Well that doesn't surprise me ! Love to see some pics of this TM you built . I also use Propnae heat with my ETM.
It's just a basic little unit. 18 HP Honda, belt driven Sutorbilt 4ml blower, cat pump, lg 3 HT heater. Let me emphasize that although I designed the systems for both the portable and TM, I had lots of help putting them together. I didn't fabricate the shell, I had a marine welder do that for me and I blended my own ideas with those of others long established. I am not a fabricator, just like tinkering with my own machines.
