> Took me 17 machines and about 50 total hours to break this one...

Mhmm, do you mean you actually bored through the safe door instead of walking around it? Impressive. ;-) Anyway, that's an awful lot of CPU cycles. And it is a lot more than the 15 seconds that a P3 class machine needs to brute-force an app that uses the Refox runtime-file branding (all the other Refox branding levels can be decompiled directly because they only leave some marks in the app that tell other Refoxes to back off).