Yea after a few busted scroll saw blades I went to the hardware store and bought some metal sheers. Makes cutting that 22 ga much easier. Whatever I could not quite get with the sheers I simply filed to shape.
This is how far I got last night. For only having pliers, a vise and hammer to shape this I think it's turning out alright.
Talk about a snug fit, wow. I thought I left me a bit more wiggle room but I guess once the surrounding walls were fabricated that distance shrunk down a bit. I still have between an 1/8 to 3/16" clearance between the tire and box though.