A fellow at the field has a great planes cub(kit) with a 13.5 inch chord and the manual recommends a CG 4 1/2 inches back. This is 33%. Our test pilots did not want to fly it with this CG. It balances level at this CG. Has anyone flown this plane with this CG? If so, how did it fly? Thanks for any help you can offer.

P.S. It was recommended he change it to 27%. Was this bad advice?