The only question I would have is how you're going to go about porting your speaker without detracting from the look of the saber.
Like most other Graflex builds I won't put any holes in the hilt. There will be some space between the speaker and pomel for resonance and with a premium speaker that should be loud enough. I may add a groove or two in the bottom section under the clamp so some more sound can escape though. Pics will absolutely be posted upon completion.