Happy Star Wars Day! (5/4/14)
For those people with smaller printers, this is a lightsaber that has been separated in three parts so when you assemble it, it will be a full size lightsaber. Just print each part, clean up the supports, and bond the pieces together. Hot glue works just fine.
This is based off of someone else's lightsaber file, which I can't find anymore, so if you are that guy, let me know. I used Autodesk 123D to remodel the entire thing and break it down into components.