bigdodgetrain posted:one thing I noticed is not enough smoke fluid, which caused the wicking to burn.
Thanks BDG, I have fallen into my nemesis - that being starving the units. Smoke was bellowing out of both stacks before the front one stopped; so, now I am thinking that volume of smoke is not the only indicator; time is the other factor. After 10 minutes of running, I should have added more fluid. BUT the gotcha is if you add too much, you mess up the fans and any other circuit boards around.