My 2013 Carbon Cub with the CC340 has 520 or so hours. The number 1 and 4 cylinders show to run a higher EGT than 2 and 3. While leaning, number 1 is peaking temperature much too soon. Resulting in the others running much richer. It also seems that it should be running smoother. It has nearly new denso IK27 plugs, with about 16 hours on them. However the coils and leads are original. Should these be changed? I also believe the carb is original and probably has not had the nozzle upgrade? Could this updated nozzle even the temperatures? The CHTs seem closely matched. At lower power settings things even out well. But this is around the 55% power range. I prefer to run it at a higher power setting. What should be done? Or am I worrying too much?