Telescope design

I have had some thoughts on a design for a Dob that uses nothing but wooden rings and aluminum tubing for the structure. It would be like a split-tube with the top tube having tubes extending from the bottom that would slip inside the tubes that make the mirror box cylinder. So the top, when slipped into the bottom would then be locked into place with 2-4 thumb bolts or other means and the slip fit of the tubing being tight enought that the structure would be quite stiff. This is the way that Hang Glider Wings are made, one tube fitting inside the other.
Anyone seen a scope of this design before?
Here is a conceptual drawing, not a great drawing, but enough to get the point across I think.
The bottom section has three rings as does the top. The upper two of the bottom section would have the Alt bearing attached as well as attaching to the tubes.
The upper has tubing extending beyond the top ring where the light shroud would also cover. So a light shroud would cover the whole thing top to bottom.
The focuser plate would attach to two of the tubes as shown.
What do you think?

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Hi Floyd
Funny that looks like a 14" scope I owned once. Here it is--originally it didn't have those ugly diagonal trusses, but instead 2 more aluminum rings which I removed to lower the cg. After I removed them it was way too springy--not sure if your design might wobble too. I also thought about converting it to a split-tube right at the altitude bearings but never got around to it. (the scope was so ugly after I did the mods I called it the Kluge. But it did have a nice pegasus mirror.) I don't think the slip tube thing is that important beyond helping to position the two pieces--there should be plenty of rigidity just from the mating of the rings, provided they're reasonably beefy. The problem is in the parallel tubes. Not sure your single ring in the middle of the upper cage would suffice. Parallel tubes tend not to work unless they're big, as in albert highe's scopes.
-George

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