I like plan b. I think having about the length of the pommel as a resonating chamber is nice. I have a saber here now with the speaker at the end of the battery pack and it butts up to the end of the pommel when I screw it in.

edit- I just thought of something, what if you did a small m/f section so that the speaker cover could lock in like a heatsink on the male side then have about a half inch with holes all around for sound and then the female threads for the standard pommel? it really would not change any of the current stuff and it could just be another add on piece that would not look to different from that piect that connects the maul fx's together.

<center></center>