Welcome to the club Bryz55, we've all done exactly that many times. That is not to say that your method was a dud, but you would need at least (in my opinion) 1000 bets to truly evaluate it. What I try to do is then give it a dry run for at least 150 bets to try and pin it down. Even then you have to realise that there will be inexplicable bad runs, I've operated a place system for over 5 years, it stands at just over 4% POT. If I was to dissect it into 3 month bits there would be a lot of treading water and even losses in some 3 month periods.

That's the nature of the game, "tenacity" I reckon the way to go is decide on a bank for the project and stick to it through thick and thin, i.e. its only had it when the banks bust.

Good luck!