I too added more right thrust. I noticed that during my uplines it wanted to go to the left.

tIANci, I didn't have to put my battery in the back. I guess with my h-stab modifications, the tail braces, and the Sullivan tail wheel my plane balanced with the battery just below the canopy. I plan on moving my cg back some to achieve better knife edge performance. Mine has a good bit of roll coupling and wants to push towards the belly. Next time I fly I may try to setup a P-mix to make it easier to sustain knife edge. I can do it, it just takes a lot of concentration to hold it.

Let me back up a bit. I stated the I made h-stab mods. On my third flight, my left h-stab seperated at the fuselage, in mid-flight while doing a "2-mistakes" high inverted pass. I was able to roll upright, and land with no further damage. Upon inspection of the broken h-stab, I noticed that the balsa was very spongy. After a call to Horizon, a new h-stab arrived. For my piece of mind, I opened the new h-stab and added a spruce spar spanning the width of the h-stab, just behind the leading edge, from corner to corner. This added a lot of lateral strength. I than added tail braces just be safe. I have since put about 20 flight without further incident.

Overall I like this plane a lot. It will go where you point it. But it can bite you if you are not careful.

Good luck and happy flying.