Instead of doing a loop, do vertical pulls in front of you and directly in line with you to the side, so you can clearly see what the model is doing. Also the vertical dive and pull out will tell you a similar tale.
Are you are saying that I do a vertical pull as the plane passes in front of me from left to right or visa versa, or do you mean to have it coming towards or away from me when I do a vertical pull?
I have printed the trimming chart and plan to do some test flying this weekend. Thanks for the info. I will let you know what happens.