Sorry if this is a "wet blanket," but once potential customers have got your material in any format, can't they do whatever they want with it...
Physical access owns all. Never forget that, never take it for granted. Once you lose physical control of something,
anything is possible. The most you can do is make certain things
more difficult, but that should not be relied heavily upon.
I don't care how big the lock is. If I have it in my garage all weekend with power tools and a cutting torch, I'm getting in.
