I'd love to see a new extension that is a rework of the MPS Pommel 5 -- rework the open end into a Female thread. Similar to the Gear Extension or a shorter Ribbed Handle extension.

Echoing BanthaPooDoo's comment that claws and shroud claw mounts would be nice.

Would also be nice to see chasis parts that would support the construction of crystal chambers -- mounts for crystal LEDs, Chasis Discs with threaded holes, and small threaded "spacers" that could be used as wire conduits:
http://forums.thecustomsabershop.com...rystal+chamber