These mods are suggested especially on the contest grade models several are building.
Contest Grade reinforcements:
Glassing of the center h-stab section with Carbon fiber laminate on the h-stab and elevator l.e. pieces ...and/or sheeting of the h-stab (all new kits will have these mods build in).
The elevator and ailerons need ply doublers and dowel reinforcements. The elevator ply doubler is 1/16" x 5/8" x 8" top and bottom. The aileron ply doublers should be 1/16" x 5/8" x 1" (top and bottom). The dowels you need are as follows:
3 - 1" x 3/8" dia. ( wing bolt locations)
2 - 2" x 3/8" dia. (anti rotation and fuse tie in dowels)
4 - 3/8"x 3/8"dia. dowels - Control horn reinforcements
1 - 1" x 3/4" dia. - Bottom LG mount
1 - 1" x 1/2" dia. - Top LG mount
Hinging No No's - See the picture. Keep your hinges away from a control horn location. I had one about 1/4" away and it cracked. I put in another corner triangle gusset in the horizontal stab (see pic) and that fixed the problem. That might not be a bad thing to go ahead and do anyway.
You may all ready have a tail wheel but, if not, here's the one I used and really like it. It's a bit expensive but well worth IMHO.
http://www.hobby-lobby.com/landinggear.htm
I used the middle one: SCE040 Tailgear Assembly, 3-1/4" x 4-1/2" with 1-1/2" Deluxe Kavan Wheel ..... $ 25.90
On the ailerons....don't forget to modify the inboard side. It needs to be shortened (from the fuse outward) by 3/8". I just laid a 3/8" stick over them (after I put them down on the plans) cut them that much, and glued a new end piece and triangle braces in place. Also, don't forget to add the hinge location doublers at all hinge locations (see pic) and the diagonal braces.
As each one goes through the build it I would appreciate any feedback you may have (good or bad) as I'm always looking to improve this plane. Also, you will have a few things different than the build thread mainly in the addition of third wing bolt /ear location at the L.E. (I just believe it will make the plane last longer, less stress on the inboard doubler). All kits now include that change. You also will have some extra parts (ear doublers so the lock nuts have something to bite into) so let me know if it's not clear.
Finally, in all the kits I am including laser cut foamy motor mounts. I had some free plywood space so I figured why not. If you don't fly foamys give them to someone who does.
Pictures below should help clarify these changes.