where can i get strong light materials????

[Tristan Lall]

Originally Posted by Tom Bottiglieri

Carbon Fiber?
Titanium?

Both are hellish to machine. (Titanium eats tools, carbon fibre emits very nasty splinters--and if you're making your own, keep the resin out of your lungs.)

Edit: Heck; Tyler beat me to it. And the welding thing is a good point--in addition to argon, you need very special welding rod; it makes you wonder how the Russians ever managed to put together the Sierra class of titanium-hulled submarines (useless fact...).