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1.) Resize CAD to compensate for waterjet imprecision. This should be on the order of 0.1 to 0.2 inches. This will be a purely radial increase.
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. Alternatively, a radial indexer may be used here.
4.) Shave off excess tabs with the lathe.
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1.) Ensure correct placement of the radial/circumference-wise holes where the part interfaces with the mission package tube. The AV Panel holes may be amended where necessary, as those will be drilled by hand, but the MPT holes are absolutely esentialessential.
2.) When drilling holes for threads, drill to at least 1.5 times the depth of the threading length to ensure full thread engagement.
3.) If you use overly thick stock, facing may be necessary. Ideally, to 0.38 inches, or the minimum length needed for full thread engagement with the piston.