Understood completely. And the answer may be to keep the endurance as is for club fund raising efforts like the original air fences. If we removed that example from this discussion, the club is still generating less income. The pricing schedule that was developed to cover the costs of a single day event has now been spread over two days. So if I race a sprint on Saturday I pay my $160. Then Sunday I race a second sprint, but instead of it costing $160 (as was the original design) it only costs me $40. The club still gets my $200 for racing two races, but the costs have doubled because it happens over two days.

Now it may not be all that fair to charge someone who only races middleweight supersport and middleweight superbike $320 just because his/her races are scheduled on different days. However, if the pricing is based on factors of costs, number of entrants, and a small profit margin I'm sure we'll need to reclaim the $120 difference per rider to maintain a two day event schedule.