Reasonably priced BIG BRAKE alternative that fits in a 15” wheel

All hand made with simple tools, this was truly a back of a napkin job lol… I’ll post a to scale drawing when I get a chance. Good idea, people can print it off and trace it onto the plate. It’s just regular mild steel 3/8” thick 5x10” pieces. It’s plenty strong and easy to work with, drill & tap