And those drop-outs look flimsier than the brake caliper you're using. I'll just close my eyes and pray for you now.......and the bracket.I thought that might be something strange in that can as I couldn't figure out the label. Starting a bike with no muffer at 8.00am, - that's naughty. Still I can remember the urge to see if something goes or not and forgetting what time it is
I think what the guy at the metal shop was meaning was that you need to make sure the axle is secure in the dropouts and isn't going to try to come adrift under braking.