They fly great... Mine was 27 pounds with a G-45 in it upright.
Make sure you install EVERYTHING ahead of the CG and use a light cockpit kit.
It is hard to lighten the tail on this Zero. Use the heaviest motor you can fit in the cowl.
Flies grat with a G-62 and a 20-10 3 blade prop from Beila.

Good luck

Rebel