What I did was:

-Added a counter on top of the rudder. About 1 inch.

-I used the cable for the throttle but had a hard time soldering the cable to the threaded connector. When I stressed tested it it failed. So I pulled it out and replaced it with the Sullivan Flex Gold-N-Rods.

-Went with the Sullivan Flex Gold-N-Rods on the whole plane.

-Beefed up the landing gear area.

-Beefed up the tail wheel area, used a Sullivan tail wheel.

-Added brace under the wing sheeting half way between the leading edge and the spar. The sheeting is thin so this helps brace it.

Other than that it was a great plane to build.
Of course these mods are personal preference and the design looks very solid to me.

Good Luck
Bill