George - thanks. OD of the Seuthe is right around 3/8" (not calipered - visual on a tape measure). Off to the store to get some brass tube and a pipe fitting tool, but can't go much further until I have the smoke unit.
For anyone else following along, here are some steps I did so far.
#1 - took off the cab. Probably could have gotten around this step, but it made it easier to do step 2.
#2 - took a long dowel and tapped the front of the boiler off from the inside. It was definite tight fit and needed the dowel and some taps on the hammer around the edge to press it out (there is a screw to remove, too, on the bottom).
Inside of boiler:
Fabricated a small foam stock piece to test fit. Need to convert this to aluminum. But exact size, placement and screw holes will need to wait until my new PS2.0 smoke unit comes next week.
