At the ridge we situated the posts such that 3 of the 4 2x's are in contact with ridge board. We had previously tied the trolley and track off to one side so we could get the posts in place.

(We later figured out that we needed to remove the track because with it pulled off to one side it would interfere with the installation of the additional bracing and we couldn't let it drop back to center because the posts are in the way.)