Yes, that sounds like a drastically different approach, and a significant improvement. However, it is based on the assumption that run groups will be tightly controlled. My impression is that there is a lot of "upward" pressure to move people into the next run group for several reasons. One of them is simply financial. What does one do if there is an uneven distribution of participants across the 4 run groups on a given day? I am under the impression that the distribution is usually bottom heavy--especially when there are credits for first timers. I suspect another reason has to do with social issues/connections. Anyway, let's see if the model you outlined propogates. I've seen such moves elsewhere, but they weren't as extensive.
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