I've got a new set of sails for my boat and decided to get the matched battens but the (tiny) problem is that there is about three different sizes in width. I happen to have previously purchased (by mistake) two different sizes of the plastic caps that have a hole and a v-jam in them but neither of them fit very well and I recently experienced one kind of them quickly loosing hold of the batten tie and letting three battens loose while under sail.

I can tie a series of small knots in the line so it will positively grab the v-jam but besides that taking forever to set up, it doesn't solve the problem that some of these caps don't fit the battens well. I could also fit the caps with epoxy/micro balloons to get a good fit but again, time consuming pain in the a$$.

What are you guys using? Does anyone ACTUALLY use the hole in the end of the batten for tying and if so, how do you tie it so that A) it is secure and B) the tension can quickly be changed?