Just to make sure:
1. You have the mast wedged to the back of the partners. If not the mast may move forward adding sag.
2. Are your lowers to tight relative to your uppers? This will take pre-bend out of the mast that will add sag.
3. Is your mast butt in the correct place? If it is too far back it will add sag. Sounds counter intuitive, but mast rake will take more sag out of the head stay than a plum mast all the way back in the partners.
Just some things to check and think about.
David
#397
