Sadly, I wound up selling my Excella. As I tore into it, it just kept snowballing. And, my friend in Elkhart couldn't build the frame for me because Airstream uses a narrower frame than "industry standard." His company builds frames for big 5th wheels and the like, where the floor and all is higher than the tops of the tires. Their main frame rails are wider than on an Airstream. He was going to do this for me as a favor, and just slip it into the production line. But as it turned out, he couldn't easily do that because of the frame width. No slipping anything in if you have to change the production tooling out....so I was looking at having to fab the frame totally from scratch.
I did take a class on welding, and bought a really nice welding machine. But I'm just not good enough.
I was also in the middle of building my house at the time and just couldn't put those kinds of hours into the Airstream.
So, I sold it to a nice couple that had a 19' they were already using and wanted a bigger trailer to restore for later on.
I bought a 34' Avion triple axle and have been using it ever since. Avion is very similar to Airstream, but their frame is a lot heavier. Actually, my 34X's frame is heavier than the one I'd designed for my Excella. We've been pretty happy with it; in fact I'm building a custom bunkbed setup for the kids right now to replace the front fold out couch (I think they call that a gaucho).
Still, someday I'd like to make a new frame and take two Excella shells and make a really neat 40 footer or so. Maybe do a slide on each side. Could be the return of MONSTREAM
Best of luck with your restoration. If I can help you at all, don't hesitate to give a shout.