Got back at it this morning. Finished the other aileron and started on the horizontal stab. First pic shows how fine the ribs are (it's a fully airfoiled surface) with my exacto knife for scale. The second picture shows the assembled surface. Mike, here's where you'll either decide to agree or disagree with me.
The horizontal stab, well, I never did find the leading edges. I had to cut out my own to shape. Never did see the labeling on the balsa sheets for those parts. Wasted two evenings looking for them. Weren't [ ] on the parts sheet either.
I've come to conclusion that you're right. They're not there at all. They're not mentioned in the directions, and only reference made is on the plans. I came to the conclusion that it's because
there is no leading edge piece to apply. The way the ribs taper down to nothing at the LE, short of the elevator core LE (pic 2) was my first clue. I dry fit the whole thing up and looked at closely, and finally just glued it. I got so carried away, I almost forgot to add the extra balsa blocks for the CA hinges like you suggested. After I sanded the LE to shape, I'm very pleased with the way it came out, pic 3. I'm quite sure that your's will suffer no adverse effects with a piece installed, but I wanted to point it out and get some impressions.
Last pic is of the assembled wing surface. I epoxied the two halves together and used carbon fiber dowels for alignment pins. I'll also be using a carbon fiber rod for the wing mount dowel. I'm done for the day, and will get the laminated spar joiners installed tomorrow and start on the vert stab.
Did you notice the assembly of the elevators and rudder? More shaping and sanding. I've got a shop-vac full of balsa dust already!