Rick,

At 0+ incidence and cg on the tube, the plane will go hard to belly in both knife edges.

You need at least 1/2+ and you might go as much as 3/4+. Move the cg forward as Joe sez.

Another thing I found helped my fuse was adding a dorsal fin just in front of the regular fin. These changes were made so that rudder to elevator mixing could be minimized