Bob, Don't waste you time ( And Balsa) sheeting the fuse ! The ply covers over very nicely. The fuse is long as you know so, do it in sections,starting from the rear. Don't attempt it in one piece, It's a mess ! LOL !
I think the vertical stab problem was covered...Anyway, I added a couple of two inch "Keys" to the bottom of the vertical and cut matching slots in the horizontal stab to accomodate the keys. Very secure !!

Ugo