My Son was reminiscing the other day about winning his Youth class on 90-120 with the Trial Winner on 25-40. And we are talking Ben Hemingway class riders there. The ideal I was told when we started was your winner on a 36-45 section Trial should be about 20. That was back in the early 2000's. I'd also say that if you have a 12 section Trial 3 should be taking marks off your best riders and 3 should be able to be cleaned by everybody. Then just make the other challenging but not dangerous with regard to who you think is going to turn up. These Days we are seeing a Very Easy course, Easy course and Medium difficultly course with a Super Hard variation on the top course for the Good riders.