Thanks for the feedback everyone. As a couple have mentioned, I've seen the tier system work. In case we as a whole havent noticed, people in the bowling alley complain....its what they do best. I'm always willing to deal with that.
@Keith Frye I was going to use entering average for the 1st 5 to 7 weeks. After that, use current average. Since its that Thursday night league at North, people shouldnt be bagging to win the strike jackpot. I'm probably going to do a test run this week with a bunch of people who I know are interested and see where it lands.
@Rocket2Pocket300 I did see that and considered using it as a guide. I like the idea of having varying amounts of doubles for each average group that's been mentioned.
The last item I might add to it.......Instead of different strikes in different frames, I might require 17 strikes for the highest average division, 15 for the middle and 13 for the bottom. But instead of removing required strikes from the sheet, the lower average bowlers can pick before the night which strikes that they want to skip. (They cant use their "Free" strikes for anywhere that there are doubles on the sheet). Gives them a feel of control.
Again, I appreciate the feedback. Thanks everyone.