If I read your drawing correctly, windtalker, I think that the split tube might lead to some flex in the wings. The phenolic tube isn't that rigid, and after some time I'd be afraid that it would bend.

I've built two of these and flown the heck out of them. I like Sig's method. My only change was a variation of what Connery did in post #6 - put in a T-nut to keep the J-bolt from ripping out. I think that their system is the simplest and most rigid. I used both rubber bands and ty-raps, and never had a problem.

Just my $.02

Bob