I AM HAVING TROUBLE FINISHING WATERFALLS. I START BY PULLING VERTICAL AND AS THE PLANE COMES TO A STOP, I GIVE FULL DOWN AND FULL THROTTLE. THE FIRST HALF IS NO PROBLEM, THE NOSE QUICKLY ROTATES DOWN BUT THE SECOND HALF IN WHERE I START HAVING PROBLEMS. I HAVE TO KEEP FULL POWER ON TO GET THE NOSE TO PULL BACK TO VERTICAL, THE PROBLEM IS ONCE I GET BACK VERTICLE THE PLANE CONTINUES TO ROTATE. IF I TRY TO PULL UP ELEVATOR TO HOLD THE PLANE, IT WILL START TO ROLL OUT. I THINK THAT I NEED TO ADD MORE TAIL WEIGHT BUT BEFORE I GO THROWING LEAD ON THE TAIL, I WANTED TO SEE IF ANYONE ELSE HAD ANY IDEAS ABOUT WHAT COULD CAUSE THIS. THE PLANE IS AN AW 300L 31% WITH A 3W 100. I HAVE 3D RATES AND PLENTY OF POWER. ANY HELP WOULD BE APPRECIATED.