Let me think.
- Pin your firewall with dowels (toothpicks) and epoxy.
- Reinforce the landing gear plate using tri-stock and epoxy. You want to tie the plate to the sides of the fuselage.
- Use 8-32 nylon bolts and matching blind nuts to hold the gear on instead of the supplied metal bolts. Its much easier to replace broken plastic bolts than to repair the fuse/gear mount plate.
- Use 3"-3.5" Sullivan skylite wheels instead of the supplied 2.5" rubber ones. Extra ground clearance for the 13" prop you'll be swinging.
- Use a 13x6 APC prop. With that motor you should get into the mid-9000 RPM range - plenty fast and lotsa thrust.
- Check the supplied motor mount carefully. Many have had problems with their mounts cracking. Better yet, replace the metal H9 mount with a GP adjustable one - less weight in the nose.
- Tailwheel - on my first one I used a Dubro tailwheel mount. On Sticks #2 and #3 I used the supplied one. Both worked. as there isn't a lot of stress on the tailwheel of this bird.
- Run a bit of tubing to redirect the oil from the crankcase vent. My .72 slobbered quite a bit, and doing this made cleanup a little less time-consuming.
- If you're using the quad-flap option use servos that center properly! Having 4 wing surfaces that don't line up consistently is a PITA.
- You'll need weight in the tail for balancing - put your battery back there. Cut a hatch in the top-rear fuse and velcro the battery in place. Cover the hole with tape. Fly the plane and shift the battery as needed to achieve your preferred balance point. Once you get the CG where you want it CA in a couple of balsa sticks to keep the battery from shifting fore and aft, then cover the hole with Ultracote.
That's everything I can remember.