Martin, I used a Supertigre .61 in mine and needed 6 0z in the nose to balance, so your set-up sounds about right. Picking it up by the wingtips isn't a valid indicator. 3.5 inches at the root is correct. I used fixed gear and a larger 1 1/4 tailwheel and ground handling is uneventful. Add power slowly and let off the elevator early and you'll be fine. It lands like the trainer that it was with no snap tendencies.

Good Luck.

Let us know how you make out.