I've just skinned 2 Sea Tour 15Rs, both have wrinkles. I can't see how to avoid them. Tom has carefully designed in some rocker in this boat, but as far as I can see more rocker = more wrinkles. I think I removed most of the design rocker when I was stretching to get rid of wrinkles. As a result my boats track beautifully, but turn quite leisurely even when edged. I'm not complaining, it just seems that it is the nature of the boat. I'd like to hear other's experience with this.