'Great Success' Rates

I did not read the rng() calls as separate values. Did you mean he should record the failures so we can determine if there are fewer great failures? Otherwise i don't see how recording failures could possibly help determine the method of calculating success; we only have access to the result of calculation unless we dig real deep and determine how many rand() calls the game makes during enchanting.

I don't know if it can be used to determine which version is used (that's the limit of my mathematical ability), but they're important in one of them, so they need to be recorded, anyway.