Pro solo is the best of 3 runs I believe. I'm down for that as well, but there is a extra entry fee of like $130.
That would be a National Tour, which is the best of 3 runs, on 2 days. 6 runs total, your best run from each day counts. Pro Solo is 12 runs (8 on Saturday, 4 on Sunday) minimum, then a bracket round for the class winners / qualifiers, starting at a round of 32 iirc? And it goes and goes until there is but one.