DonMany Hunter 356 owners with an in mast main (B&R Rig) have had problems with leech flutter when sailing at a reach or higher at 15 to 18 knot winds even with a tight leech line. I sent my sail back to UK who made some adjustments on the seam overlap which did help but did not totaly eliminate the flutter. I know that one fix would be to buy a new main with vertical battens however I am not ready to spend the additional dollars at this time. Can you recommend any other adjustments that I can make to eliminate the flutter.