I really appreciate your respond! I have the mast track back in the point that i see the half of the entry hole. My footstraps are in the middle. I have a custom mast 550 100% 36 icms. I had gaastra and i broke it when i was pumping. With the new mast i find the capmer rotetion easier but not perfect! Today i was sailing at 12 knots pretty good. I realize that the main problem is the accelaration in turns ( tack or jibbing). I can not plan again quickly, i feel the sail emty, and i pump again and again loosing time. If the wind goes down from 10 knots i can not sail at all! The sail is gaastra 2010 technora 11.0 size and the boom is neilpryde x9.
Thanks a lot!