Bill,

Hopefully someone with the real info will pipe in on the CG. What you quoted does not sound right, but I am about 8,000 miles from my Bipe and its plans. I remember the CG to be around 1-1/2" or so forward of the back of top wing (at the center cut-out). I glued a short piece of 1/4" dowel at that spot and would lift from it to see how it balanced.

I fly with a 15 or 16" prop. Get a lot smaller and it looks out of place in front of that big cowl.

Have fun!

Bedford