After a trip to Bonny Doon, California, to pick up the battery boxes, I actually have most of the parts in-hand (except for the controller mounting, see later post...). Here are the parts layed out on my living room floor:
Here are the battery boxes and mounting hardware. They are well-constructed, and I'm happy to have them (I saved EA quite a lot of money by getting them myself)
I took this opportunity to mate the motor with the mounting hardware. Stage 1 is the adapter ring, a massive hunk of well-machined aluminum:
Stage 2 is a custom-machined piece designed to fit the 914's transmission:
Just for fun, I dry-mounted the flywheel I'm not ready to do it for real yet.