on another forum, the topic of when to pick niagra was discussed. it was mentioned and agreed that picking at brix in the 14-15 range in correct, and is also correct for concord. we have concord, but in past years i have tried to go for a higher brix. am i wasting time?? do you recommend going with the 14-15 brix range?? are there any other grapes where this range is desirable??st croix? frontenac? foch?