Originally Posted by Sabreman
Should I ditch the vang and stay with the preventer? This discussion is not about rigid vangs, it's about whether any vang can effectively shape a mid-size main with mid-boom sheeting.
Disclaimer: I didn't read 3 pages of replies.
Short answer: YES
Long answer: You need to move the attachment point on the boom towards the gooseneck. Try to keep the angle of the purchase to around 45*, that will be the most efficient angle. 8:1 might do it, but a 16:1 would probably be better for that size boat. Can you get a better photo? Email it to me and I'll take a closer look.