Continuing on with the fuselage sides.....

Now mark the rear of the fuse at the tail post to cut the bottom taper from F5 back to the tail post. nothing fancy, just use a straight edge and have at it. Do not cut the angle forward of F2, the 1/8" side is left in place.

Lay the fuse sides top to top and make sure everything is still straight, and your former locations match exactly.

Now you need to glue on the 1/4" stringers. If you're using 1/4" stock, weigh themmmyou won't believe the eiddference. If it weighs more than 5 grams, don't use it. If you just can't get any good stock, make them yourself by cutting strips from a 4-6 lb 1/4" balsa sheet. Use Ca, keep it light. They won't go all the way, so you'll need to splice them 1 bay forward of the fuse side splice. The best way to do this is cut at a 45 degree angle with a razor saw and mitre box, then they will spread the load better.

Note: the stringers stop at the front of the tail block location.

Forward of F-2, on the glow version the bottom stringer angles upward to the firewall. You may have to make a relief cut here.

On the electric version, the stringer runs straight just like the top.

When you have all of the stringers in place, llay the sides top to top again and have a look. Don't do anything yet, just make a mental note.