We had one of those brake/shear/roller thingies at my last shop. We did WAY thicker than 20 ga and it didn't explode on us it's on the 'once I have a bigger garage' list after the mill and the lathe....
If you're in Ontario I have a '77 hatch in slightly better shape you can have for cheap.
A little advice I'll share on the sheer/bender...I made a second handle so your working both sides of the tool...it helped BIG time! You can use one handle until you get the piece steady where you need it...get a bit of pressure going & then get ahold of the other handle...makes the cutting & bending MUCH easier. I've been able to cut/bend 18 ga. rather easily up to about 15" wide. Lorne
little bit of elbow grease this is how it sits now.
ran into an issue where the new pan didnt fit. (didnt realize it was only for old blocks and not ones for the one piece rear seals. so this will need to go back to summit. guess i will have to cut the stock pan.