I am of the same opinion and will try additional weight in the nose. I did notice, when closely examining the aircraft, that the rudder is somewhat warped, with the top of the rudder leaning somewhat to left rudder and the bottom (larger part) angeling more toward right rudder. I may trim in some additional left rudder and see if this helps because I trimmed the rudder by looking down from the top and aligning the top of the rudder. This meant that the larger portion of the rudder, the bottom, actually had some right rudder trimmed in.
I'll fly it again soon and post the results.
It is actually a fun airplane to fly with the G-23 gas engine installed in the nose. Very reliable and solid, except for the above described tendency to drop the right wing.