Randy, here's the changes that Darrol Cady reccommended in the Feb. NMPRA newsletter:
1. cut a 2.25x2.25x1/8" aircraft plywood plate. Epoxy it to the front of the firewall before you start drilling any mounting holes. This will disperse any shock of a hard landing to the fuselage side and the top and bottom. It will help keep the firewall in cace of a bump.
2. Triangulate the wing to the fuse and tap the mounting holes with 1/4-20 nylon bolts. The metric bolts will be impossible to replace if you misplace them.
3. Replace the hardwood wing hold down plate with plywood of the same thickness and make a fillet of epoxy and micro-balloons around bottom all of the wing hold downs and the landing gear block.
4. Drill and pin with toothpicks all of the wing hold downs, landing gear blocks and the firewall.
Changes that are nice and will give better performance:
1. Cut the aileron torque rods out and replace them with 4-40 threaded rod. This must be done before the ailerons are glued in place.
2. raise the stab about 3/8" and put the elevator horns inside the fuse. Lots of work, and I am not sure the effort is worth the performance gain.
3. Replace the push rods with 1/8 carbon push rods.

I think everyone interested in pylon racing should join the NMPRA to get this type pf information on a regular basis, Its a great voice for ur racers also! Bawana.