I had mine set at 1/8" above the fuse line on the rear part of the elevator per the instructions. I am happy with the CG at this point (lands like a baby even so far forward), but I will move it back to see the change. I am still working on the right prop combo for speed. With a 12X7 she went over 110 mph yet with my 14x7 break in prop she went a whopping 75 . I was able to get a flight in yesterday before the motor came loose and I called it a day, but all is well now and I may try it again tomorrow weather permitting. The spring air 705 retracts work flawless and still had 60 lbs of air in them after a week of sitting! This is one of the best prop jets I have ever owned as far as looks and flight performance!!! Hats off to Cermark!