Well, IMO, all runs at a national or divisional event should count towards qualifying. The only time you should have time trials is if the event is rescheduled. Time trials are for test-n-tune day.
Just because class has already been run doesn't mean you can't have another qualifier or is that a rule I don't know about? What if somebody shows up on Saturday? Is tech closed on Saturday?
I like the idea of qualifying runs on Friday and class eliminations on Saturday. That way class will be the the last pass before eliminations.
Another question, if the ladders are already set, why not just go straight into eliminations instead of giving everybody a time trial?
Time trials are for the .90 classes, not stock/super stock.
-Toby