Since the battery is strapped down under the fuel tank, it could easily be moved towards the rear. I could also remove the heavy brass prop nut and go back to the aluminum one. (They look exactly the same.) Haven't decided which route to take. However, you might want to fly the plane with the CG at 70mm as the starting point. Hopefully, your flying weather will be there soon.

P.S. One of our club members actually flew many hours in 156233. Cool, huh?