Ditto on the tail heavy. I had an O.S. 52 four stroke on the dubro viberation mounts which really put it out front, and I still needed 6 oz of lead under the engine to balance it out.

It must be the wood. I have never seen balsa so hard. When I built the 4 * scaled down wings, copied the D tube construction of the Explorer. I used some Bass wood from an old set shutters I tore out of the house for spar and TE material. I was afraid it was going to be to heavy, but the new wing weighed in 8 oz less thant the Explorer wing. I would have bet it was going to be the other way around. One thing about the hard wood, it does take a beating. That fence, the first one, was just to much though. The wing only needed a small repair though.

Don