Lightweight scopes

Hi guys. I was making some sketches lately and tried to design a 10" dob for travelling. I got a 10" blank which I would like to grind next spring and I would like to build a transportable scope. I got it folded up quit small but I'w worried about the weight. I was wondering what's a strong and yet lightweight material that I could use to build it? Also, what would be the average size of an overhead-luggage compartment?
Nico

Aluminum would be just about ideal, if you have the facility for working it. However, I don't know how comfortable the TSA (transportation safety authority) agents would be with you carrying around a big aluminum box. A well-designed plywood design would be my first choice, I think.

As for dimensions, carryon luggage is limited to 22" x 14" x 9". I don't know if those dimensions would be functional for a rigid body, as opposed to a semi-flexible piece of luggage.

Alternatively, you could check the folded scope, but carry the mirror or perhaps an entire mirror cell assembly in a custom carry-on case.

Keep us up to date on your design and eventual implementation -- I plan on building a ultra-transportable in the future, and any info is welcome.