Leech and Foot lines

[XPatriot]

Sailcare did a fabulous job cleaning, fixing and replacing the protective fabric on my 150 jib.

They also replaced the foot and leech lines. I know these help shape the sail, but despite reading a lot of discussion on halyard and forestay tension, position of car on track, tell tales etc. I really haven't seen too much info. on adjusting them. Should I keep them snug to help the sail from being blown out?

Sailcare also gave me about 2-3 foot of spare line and I'm assuming I'd never need that amount so should trim it back.

Any general advice? Thanks!

[treilley]

I use mine more to protect the sail than for performance. Luffing leeches kill sails. Now repeat 5 times fast!

[SVAuspicious]

As the wind picks up the leech is likely to flutter which is tough on the sail and also results in detached air flow. Snug the leech cord up until it just stops the flutter. When the wind drops the taught leech cord will cause the leech to cup acting as a parachute and slowing the boat - ease the leech cord.