Hi Bob,
My build is a 1920 fisherman schooner. The plans show no lines from the gaffs that would pull them down to keep tension on the halyards. The boom topping lifts do not attach anywhere on the gaffs. On the main mast there is a single flag halyard that is attached to the end of the main gaff that helps with the gaff halyard tension, but no line on the fore gaff. I will hope that another builder has an idea, Thanks for your help and good luck with your builds.
Maggie