tape one to the tripod?? adaptor is the way to go mind
I'd say thats still possible, with a bit of fiddling.
If you could fix your flash to your tripod, you could cable tie of llash an umbrella to the tripod in the right posn. Crude but would work. You'd be limited to the angle it fires in though.
Something along those lines is what I was thinking, being cheap!Would the umbrella be too heavy to attach to the tilting flash head then?
Cool, I'll be interested to know how it goes mate, good luck with it.