Steve,

I omitted FN1 from my fin. If you added FN1, just cut it to fit between FN6 and the tail post. To mount the fin, glue FN6 to to F12, glue the sheeting from the fin to the top of the 1/8" balsa fuselage sides, and F13 glues to the inside of the fin sheeting and FN2. In the picture with the fin mounted, you can kind of make out the glue joint at the base of the fin. Unfortunately, these are the best pictures of the fin mounting. PM me if you need more info.

Jeff