JFM11: I just had my first flight with my nitroplanes P-47 (1400 mm). I am not new to this hobby. I watched the nitroplanes flt video and the young man had two P-47's. One with added weight and one without. He flew both planes with no trouble. My flt was not that great. After lift off, plane started porposing. I managed to keep it under control and flew for about a minute before I decided to get the plane on the ground. I landed the plane without any trouble and went home to recheck my CG. I had used my Greatplanes CG checker before the flt and had added about 1 ounce. With battery all the way in, it balanced level. I am going to add a couple more ounces to make sure it is a little nose heavy. My question is, does everyone agree with me that this is a CG problem. I have checked everything else out. Did notice that elevater control appeared to be slightly bowing when given full movement. Not sure this had anything to do with porposing. Anyones response would be apprciated.