With the jib leech telltales (not to be confused with the luff telltales that help provide ... spaced 6 inches apart, and when sailing in ideal conditions, with the perfect trim on the edge ...

First, let’s discuss using them to set up the jib for the conditions. Essentially, the luff telltales show us the sail’s twist, and the leech telltales show us how tightly it is trimmed.