Order of Operations:
0.) Procure Aluminum 6061 Stock. Please try to have the thickness be as close as possible. Create a machining drawing to help hasten the process.
1.) Resize CAD to compensate for waterjet imprecision. This should be on the order of 0.1 to 0.2 inches.
2.) Waterjet the part. Add tabs where necessary and validate the path to avoid creasing and double cuts.
3.) Thread the center hole in a lathe. This may be done with the aid of the reverse function.
4.) Shave off excess tabs with the lathe.
5.) Position in a mill and place the lateral/flat-side holes where we interface with the AV Panels. You may zero the surface to ensure flatness with parallels or with a deflection gauge.
6.) Repeat the process for all 3 sides of the piston mount.
7.) Place in a radial indexer either by screwing it onto the prison or finding some other method of extrusion where necessary. Mark out the holes expected positions on the physical part to aid the process, and guide holes may be helpful sanity checks.