We are a small seafood manufacturer and currently use Styrofoam trays w/ overwrap or plastic trays w/heat seal to package our product. Currently, the abbreviated process steps are cooking >> iqf >> packaging >> metal detection >> cold storage. Obviously, metal detection is one of our CCPs. The company wants to move to using aluminum tray packaging, which is a dilemma for me as QA Manager. A process change (e.g., metal detector before packaging) would not suffice as the wrapping machines and sealers have metal parts. X-rays are currently far beyond budget. Any ideas for me as far as risk assessment for a process change... or any ideas in general?