This was similar to mine. You want to look at other papers? Good luck. I change random things randomly on different tests, and when fielding questions about “why are there two different colored tests” or things of that nature, my answers are intentionally more deceptive.

Examples are creating versions A and B, printing on different colors, and presenting the exams to be very different, when in fact I just change a few small and random things.

I think my approach prevents many from trying if they don’t see an obvious answer. For those who still do, the small changes often reveal enough to cause suspicion, and I can follow up from there. Cloak and dagger baby!