You apparently have the skills. The better way is to solder the courses back together, and that could have been done with the same torch.
I too use the brass bar rail, but screw it together with rings underneath, using 2-56 brass F/H screws before soldering. With the right flux, the solder just leaps in there.
Too late now, but when the Hines Lines show up, they go for $150-$300. And the Scale Craft K4 has the L1 boiler, but its taper is not like the big USRA.
Very nice work!
While I appreciate your compliments, I'm just winging this as I go along. I'm totally in awe of the people who put things like this together in the first place, fabbed completely out of brass, as that's a level of skill I can only dream of attaining. When I look at the original postwar Hines Lines models, I'm amazed at what they were able to do at the time with the tools they had. Truly works of art...