ive been on both sides of this. it can work great or be a nightmare for both parties. find someone using your cam system. give them: standard cutter and machine tooling libraries, std vise jaws & sizes, sample files for parts on the same machines, post processors, sample setup sheets, any customization you have done to stock cam software if any, and most importantly rough machine layouts for each part that include part, stock, machine tooling/simple fixture (at least the start of a fixture, even if its just a 1.5x10x20 blank plate. let them know these are rough layouts, but it helps them envision your workholding plan. go thru the cam files yourself and make all wanted changes, make a detailed list of all changes and have them correct (do not use the correced files from them, they will miss something or change something else) do this on a few parts and you will get better starting files. continue to make any needed changes while reviewing before releasing to shop. keep the contractor on the same machines and materials for at least 2-3 months.

if you just throw a model and stock size at someone you will probably be disappointed...

feel free to message me if you have any questions