looking good!
when i say an inside 90* bend, i mean something like 3" wide flatbar over a 6" or longer stretch... so difficult... doing 1" square tubing isn't easy, but flatbar, or anything else that doesn't really give you access from the sides is SO much harder... because you have to get the gun in there, keep it moving, AND see what you're doing all in 1/2 the space as you do when it's flat...
most welds of >90* are HARD dare i say nearly impossible... i can (used to be able to, haven't welded ANYTHING in about a year, haven't mig welded in about 5 years or so) do 90's alright, tried some around 100ish... more than that and i don't think you could unless you're sticking it