If you don't mind a douche for a master (read Fy's profile, he's harsher than you probably remember). If you don't mind him, you can start a thread. As Fy doesn't really take students, ask Gaba if it's possible for Leon to be assigned to Fy (perhaps as payback for stealing his hologram projection pad)
Well it's fine either way, it's the trend lately for people to go over. At the very least you'll see Mira Albion there [Guhoo's former master :P], but do know that Guhoo will have love for him regardless which side he's on. He really is above that silly light-dark side.
Well, Mira is Sith master now <.< >.>
I wouldn't mind taking him through a mission with her, she wouldn't mind either xD. It's be the Jedi council who might take offense to that xD