And very thin 531 tooThe art is in being able to do it at low temperatures, otherwise you reverse the heat treatment and have some very pricey 531.
If it doesn't work out though, that would be a terrible shame. Both expensively and waste of a pretty rare (these days) tubesetI'm going to have a chat with a local frame builder/repairer mid week. I reckon with the experience I've already got I could put one together.. It won't be SBDU though hahaha
I'm pretty sure it's 'optional', for instruction onlyWon't Reynolds be on your back if you don't go through their Certification?
https://www.reynoldstechnology.biz/materials/past-materials/s-753/