[HumblePie]

If you don't have access to a CNC router, but do have access to a 3D printer, here's a technique we've used.

Print a template of the part you'd like to (accurately) produce, at least 4mm thick (and in multiple interlocking pieces if the piece is larger than your printer envelope). Fasten the template to a rough cut piece of plywood using screws or double sided tape, and run the sandwich across a router table with a pattern trim bit installed (A team member with woodworking experience is a plus for this part). The resultant part is accurate and has a nice clean, smooth edge.

We used this technique for making our shooter rail (2 pieces of 3/4" oak plywood laminated together), and a support ring for the feeder bucket.