JAXAshby wrote in message
...
The most likely tear is from catching something, such as a spreader tip.

Your spreader tips should have protectors on them to avoid this.
The most likely tear is at the inner end of the sail batten pockets

btw, why do you say that a "proper" repair is one made by a sailmaker?
Sail
repair tape/cloth works immediately and lasts for years. How can a repair
made
by a sailmaker next week be more "proper"? (not that I mind taking your
money,
you understand)

Try selling a yacht whose sails are all stuck together with bits of tape
and you will understand.