the Captian may be on to something there. I would try to splice in a piece of appropriate diam. PVC pipe. as long as you like. would give room for electronics, extra batteries. Even without the original scooter, come to think of it, I would use some 6" black PVC pipe ( hardware store, I think about 10 dollars for a 4' section), end caps ( some threaded!! ) and of course, glue. Maybe two, side by side, for some real battery, and bouancy( sp??) space. Or under/over to give the craft a natural 'attitude' ( batteries, motor below/ electronics, air-bouancy above). buy a 10 foot piece, and you could make one you could ride like a broom (well OK, motorcycle). LOL