I decided to
make a tool bag bracket today out of some 20Ga. stainless I had laying around. The design seems sound, but the 20Ga. is way too thin. There is a lot of flex and bouncing around. Then I remembered the brackets that Phil and others have made up:

What gauge did you use for them and do they flex like what I'm experiencing? I know I need thicker, just wondering how much to keep it rock solid.
Cheers,
Brad