Hello David:
Do not sweat this setup! I just put a ST G20/.23 on a similar airplane and in the past, that combination has worked very well for me. I have flown many planes with one wheel and many times I used a stooge to launch the plane! The single wheel is great for flying over rough grass as it prevents the plane from nosing over upon landing. I have gone as far as to place a skid on the bottom of the plane in lieu of any wheels. This too works very well for hand launching and landing on grass! I have also been known to place a small wheel on the top of the plane to protect the nva, Lol
Good luck,
Frank McCune