Looks like you've got this well under control! Great progress.
My only comment would be that (in particular on the wing connections) is try shorter stitches to keep heat down with the thinner gauge you're using. My experience is that when I get a lot of heat into work like this I end up with more movement and 'warping' than I'd like and my fitment ends up wonky.
Thanks, it's been a great learning experience for sure. I do plan to weld small sections in opposing areas to keep the heat from getting too concentrated in one spot. Hopefully it doesn't warp up too much.
I'm not looking forward to the final phase .......painting......IH8PAINT. I am not good at it at all. I can never seem to get an even coat with spray paint. Any tips on that would be greatly appreciated. I usually wipe the whole thing down with mineral spirits, apply primer, then paint.