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yeah... i kind of figured it that way... that's why i linked the gundam image...

another variant would be this...

http://www.flickr.com/photos/infrasmell/3965457110/in/photostream/

as you can see... this one has the same concept of the one you're mentioning...

sorry for the first image... i was actually mentioning this... but cannot find it at first...

from one of my earlier stories... i designed a set of swords that has the same concept...

don't get me wrong... i'm not a copycat... i designed the same concept due to how a lightsaber has a limited length despite the end is made of light and the fact that the bean is straight unlike most energy based swords...

i'm starting to sound weird... so i might as well shut up...