Ok...a question that deserves it's own thread, and that I will go search Frameforum for; how does one hold the tubing in place without a jig?

I have no intention of making a living at this...at least not yet. I make a good living as a fighter pilot right now. But I do want to take it up as a hobby, and make some very small volume sales, as well as do builds at cost for friends, once I'm competent enough to send someone out on a frame that I craft.