I appreciate the responses. Will try to upload some pics of my setup tomorrow. When flying with the protruding camera, I have not changed aileron or rudder trims. They are still set as they are for normal flight without the cams. Flying with cams mounted flat against the fuse and facing to the side has not created any problems. Problems seem to arise only when the camera is facing forward. Will try again, but 1 time awhile back I tried mounting the cam on top of the wing over the center of gravity. The cam was standing upright and mounted with velco and a brace behind it. It was all I could do to get the plane around 1 time and back safely on the ground.
(link to video of 2 cameras mounted flat.)
http://www.youtube.com/watch?v=S5_RPc4fU9E