I've started building my own Lightsaber, based on http://bigyellowbox.tripod.com/index.htm Style V.
I'm modifying of the original plan, with a threaded rod that'll go all the way through the saber... and according to my plan have a detachable blade that'll screw on the end of the rod....
Rough Assembly: nothing is permanently attached.
Top: Control Collar (needs to be cut and stuff riveted to it)
Middle: Main Hilt- parts: sink knob, vacuum hose, ~7" of Metal Pipe
Bottom: Wooden Dowel core... with rubber o-rings
The threaded rod below that.
I'm still building it, so I'll be updating this post as time goes by...