Anyone have any recommendations on a build your own frame course.
I spotted on YouTube a small steel frame builder offering courses at their business. Google search if your best bet
Geoff Roberts, from one of the great frame-making families:
Reilly cycleworks did do them and I think George Longstaff did as well
There's also the bamboo option: https://www.bamboobicycleclub.org/build/weekend-workshops/