So the scale is around 16" base diameter, 32" tall, or around 40x80cm. Capabilities will be sought out as needed, since the program is design, our workshop caters mostly to prototyping things and woodwork. It's for a fairly substantial business prize (~10 cheese) and will be used for at LEAST 10 years, so that amortizes nicely.
The model does have dovetailed wooden placards and a channel that would be cut in after the plates are rolled, but the issue is the slot is located at about 1/3 of the face, and not the center, so running a bolt behind it isn't ideal, because of the weight some people have indicated it should be connected at the center back, they want people to hoist the trophy proudly. Think it would be an issue? It would be a thin section if it was dovetailed too, the shortest bit I've seen has been 3/8 x 45*, out of a 1/4" sheet, with a good countersink, doesn't leave much.
What I'm thinking now is to braze on the the connectors with a threaded insert to the central shaft first, and tap the back of the plates with a reverse threading. If a machinist can knock up double sided forward and reverse threaded stud bolts with a knurled barrel or something in the middle, I'm thinking they could just screw together (both directions at once)
As for the bottom, If the waterjet has this level of multi-axis articulation (anybody?) it could cut this:
GVCT2 Base concentric rings cut by MilkyWilky, on Flickr
That would probably be a few less man hours than doing 10 on a lathe, and profiling this way you could just profile the aluminium block once. Also waterjet has a pretty good finish I understand. We are on a bit of a schedule.
I like the idea of facing the base with the wood, might be a sneaky way to shave some weight too. Might leave it empty as well, but I really think the design is better with more wood. I also will keep the idea of doing the center in a few sections in mind, but would rather not have to worry about making that look all good n shit reassembled.
Since I've brazed before that's probably what I'd prefer to do, but things start to get pretty tight when the pieces are all on. Worry about working on the backside. Maybe I misunderstood.
If those are just 70 degree lines being cut out of a flat plate a waterjet can cut them as long as the machine is 5 Axis. But to get the 30 degree?? on that plate you'll either need to have it machined or surface or Creep Feed ground. To get the best finish i'd suggest surface ground (surface grinder can get you to a 32 finish.) If you weren't in Vancouver i'd give you a quote for the entire job.