I read the entry on lightsabers in my New Essential Guide to SW Weapons and Tech, but it didn't say anything about a gyroscopic effect or lack thereof. From what I've read though, the idea of the gyroscopic effect has to do with the way the plasma beam/saber blade or whatever is focused into a blade. It has to be made to go out of the hilt and extend to a fixed point then loop back around and return the energy to the hilt was my sort of laymen's understanding, which would make sense to me that that would generate some sort of slightly unwieldy gyroscopic effect. It probably wouldn't be massive, but enough that it would be awkward for someone who's never used a saber before to start slashing around with exactly the same finesse and skill they have with a normal sword. Yes Vader's saber was a dual-phase lightsaber. Still though, if a Jedi's chosen saber length for their lightsaber only has to due with power and crystal requirements, why doesn't every Jedi build a giant saber like Desann had? Did Desann get better/bigger saber crystals and a better battery for his saber than every other Jedi? That doesn't make any sense to me. I would think only he and strong species like Wookiees would handle a huge saber like that comfortably as a normal species Jedi could a regular size saber. Also, I've always had it in my imagination that if you could actually build a lightsaber in real life, that it would require that you plug it into a nuclear power plant to have enough power to keep it running. If that was the case, I don't have a hard time thinking that even with Star Wars tech there would be at least some kind of mild gyroscopic effect or something similar generated from something using a lot of energy.