I took 1/2 the day to put together my first cooling tube. The welds could be a little neater, but I believe they are air tight, burn right through those spot welds, guys! I’m psyched just to have one done. It turned out just as I planned and I have the final placements marked for all 4 tubes. Two sets of tubes will be opposite each other. First pic, a few inside tack welds to get started. Last pic, dismantle the parts for cleaning, gasket replacement, etc. I can’t tell you how good it is to be able to get at this for changes relatively easily. I can easily maneuver around the unit or maneuver the unit around.
EDIT In the third pic the statements should be reversed.