Just for fun, I added the rough boiler to the frame to see how the proportions are turning out. I gotta say, just adding the tube really gives the whole project some life!
Other than the saddles, there’s no “physical” way for the boiler to connect to the frames yet (that’ll be the job of the braces). So right now it’s just “hanging” there.
Notice also that the firebox is inside the boiler now, but it’s not yet connected by rivets and stay bolts.