Thanks for all the info - yes, the guys at Z are very nice to work with - I just got a new "Z" #3 (my first sail from them). For what it's worth, PHRF-MA rates OD at 138, PHRF at 141, and "does not penalize for material". But, if I change sail material, I default up to 141 and take 9 spm hit (by PHRF bylaws) for OD pole and #1 to 132. Effectively 6 spm hit for a "no penalty" change.
