Custom tapered main sheet made from 8mm LIROS Magic Pro. 7.8m long. Taper spliced just aft of the main ratchet block at 1.5m for smoother running thru purchase blocks. Eye spliced end to easily cow hitch onto boom. Shock cord stitched in other end for tidy up system. $150.
Allwood Sails custom make tapered sheets to suit your needs.