4 grand on each weapon motor? He uses Eteks at the moment at around $350 a piece.
Last rites/Tombstone is a great machine but technology wise hasn't moved on a lot. It's the reliability of it that makes it work well. It ha an etek on the bar, something like 90-100 A123 cells to power it and and the standard NPC motors and gearboxes bolted straight into a box section frame (he machines one part of the NPC gearbox himself out of aluminium billet rather than using the cast ones for shock purposes.