I got "burned" several times by chainsaw drivers who claimed their wood was "fully aged" and turned out not to be as advertised, and I did not know what was wrong until I bought one, cut a few splits in half, and measured the internal moisture.
Found out my $600 worth of firewood was at 40%, so in addition to having to buy storage racks and stacking splits, I had to buy MORE wood.
I would like to see pics of the inside of the choo choo train cooker, perhaps the problem is down to a strange placement of the cook grate in relation to the fire box opening?
Frankly I've never seen a "Gimmick" cooker that was much more than yard art.