Looks like your Mozzie was built around 1986/87 from the history available through titles results etc.

The tuning guide available through the Victorian Mosquito Asn. gives some good info on bridle length (jib setup) and associated stresses. If the bridle is too short there is too much stress pulling the hulls together as you pull the mainsheet tight. If the bridle is too long then the jib is set too high and the jib mounting point on the trampoline is too far back and everyone just gets tangled up when tacking. The effort on the sail is also higher than it needs to be.

Happy racing.

Regards,

Peter