Also, I've gotta disagree with you about playing less plays. I figure that any play that fits your system's criteria should hit at least 55%. ANY play that you think has at least a 53% chance of winning, you should always play, no questions asked. Even if you only go 11-9 on your worst plays, you are still kicking ass long term.
As long as you're not chasing, which it doesn't look like you are, then there's nothing wrong with playing a lot of games.