Attaching the smokebox

[little giant]

I used 1/8 x 1 inch crs flat stock, rolled to the Id of the boiler. I used (6) 10-32 flat head screws drilled 3/16 from edge of boiler and tapped into the flat stock ring. I then drilled 4 holes in the smokebox and tapped 8-32 into the ring and used model hex bolts on the outside of the smokebox for show.