From Jerry's rigging site:
Regarding the Montgomery 15, the only change I ever made to the standing rigging during the production life of the boat was to increase the length of the forestay about an inch and shorten the shrouds about half that much. Initially, there was an amazing coincidence in that all three wires were nearly the same length; plenty close enough so that the stay adjusters would take up the difference if the forestay was set in one of the last two holes. Only problem was that new sailors would try to balance all the wires to as close to the center of the adjusters as possible which set up the mast too plumb; the 15 sails best with the mast raked aft. As soon as I became aware that people were doing this I simply lengthened the forestay and shortened the shrouds, encouraging owners to set up the mast with a little rake. I hate to see Montgomery boats going slow!
What I'd like to know is, when did the change in rigging occur? Mine's an '84, should I lengthen the forestay? Bobbie