Actually that is exactly what I am doing - sticking with the loft which has sold me sails since 1984! When I raced dinghy's! They have had a few name, or franchise, changes over the years, North, Quantum, etc.. but essentially the same sail makers who know what they are doing and have actually raced the J 30...
Nice that the price is right too. Can't beat it.
Thanks for all the insight and advice.