Interesting, I ran a couple of such courses just a few years back, went down very well. Not sure if I'd want to repeat them but may consider it if enough interest. Won't be for at least a year though, as I'm still working on the new house, nearly got all the windows in.
On another coincidence, I do have going spare a minty 2215 with good tube and minty 2465B. Could be prised out of my hands for due consideration. These have both not had any use at all and I think I've probably got all the manuals for them but I'll have to check that.