Originally Posted by Terry Pieters
Possibly build your own case from correx or other light material. You could design it to be protective and snug fit also protecting your gear.
This is what I was thinking. I have a pick-up with a back seat. Everything I have fits back there (not all at once). I have thought about if I got something giant scale that doesn't disassemble easily, I would stick it in the bed of the truck and cover it with some sort of cargo net.
I think the build your own custom box would be the way to go. I'd consider a frame made of some wooden or fiberglass dowels and then glue or screw some sort of siding to them. Coroplast comes to mind. (That is what we used for our political road signs in the States). It is basically the same as a corogated shipping cardboard box, but it is made of plastic.
Then stuff the box with soft foam, custom made for your plane. A little work to be sure, but customizable to your needs and lightweight.