Luis, I had the same trouble getting equally spaced stringer slots on the formers! Here's my solution-- First I cut the formers to size-- Took former #6 and used a pair of dividers to get 7 equal spaces around the circumference of the former. Do former #8 the same way but do not do former #7 until you can temporarily mount them on the Fuse. run a string line from the marks on #6 and #8 and mark #7 "Steze" http://community.webtv.net/smlangford/StevesFlyBaby