I think Jackdaw will appreciate the cassette tape telltales. They are light, flexible, don't interrupt airflow. Maybe the electrical, but that doesn't look too intrusive to airflow or sail shape either. He'll love that you have them at all.
- Will (Dragonfly)
On a best practice scale of 1-10, 1 being do this and you're taken to the flight line and shot, 10, the world can stand on your shoulders and see a bright future, electrical tape on white sails is a 2. The adhesive leaves a mark. Its not a 1 because the mark tells you where to place the replacement telltale. i would not use electrical tape on a newer sail. Ive cut down the number used recently as well. I have 4 going from the luff to leach, intersecting the geometric center. With a fifth telltale extending out from the leach. I only have one jib sheet control so theres no need to try and get top middle and botyom telltales right. I usually cant see the top one anyways. That telltale by the tack is on its way out as well. I hardly look there. I watch that one section in the middle and make great gains. Gonna plane this season, even with granny panty sails.
Cassette tape telltales are the bomb. I used the red an green wool ones from wm but they are stuck half the time and really aren't that helpful in less than 10knot. I keep the wool telltales on the batten leaches. In strong winds i am more concered about making sure the airflow is directed in the right direction and not getting more lift.
Those wrinkles mock me and my quest to get the hunter170 on plane.