Not sure where your CG figures came from, but all else equal if you increase wing area you need more stab area to get the same stability at the same CG. Even then, it's hard to tell with bipes because you don't know how much of the load is carried by which wing. I have been surprised by two of my bipes now. I did my usual calculations to get a balance point, but they both were very neutral in pitch, and a little unnerving to fly until I moved the CG forward, more than I expected. I my case a heavy hub was all I needed. Nice looking plane, sorry to hear of the damage.

Jim