This is looking great!! I am close to this stage on my build. Well, right after I buy a welder, and some steel! LOL
Welding a few brewery frames myself, yes, you can keep it as square as you can. But even dead perfect square to start, will not be perfect square when you are done. Heat moves metal in funny ways.
Say, I notice you have some Jalousie windows in your shop. I'll be needing those for my build! Thanks!
Yea, my biggest challenge to date is finding my windows.