My training level dressage gelding gapes his mouth open at the halt, and I am working on this issue with the assistance of my trainer. He is otherwise very quiet in a loose ring french link snaffle, but I thought that a flash noseband might help me work through this. Anyone have a flash attachment, tips on making one myself (without the aid of a leather sewing machine, I'd have to have some creative suggestions), or an old flash cavesson or dropped noseband lying around? He takes a horse size bridle and I would accept any color or condition as long as it can be made useable and safe.