Hi John, the ideal location for a wheel is not directly under the CG!
The ideal location for a wheel or wheels or even a towhook is 15 degrees
in front of the CG.This has been a known trim for quite a few decades.
I first heard about the 15 degree location in 1958 when I built my first
A1 Nordic glider . I then noticed that most of the top stunt flyers located
their landing gear very close to that same 15 degrees.
Tony