Basically I have been walking like in "a snake game" in order to cover every detail. My model is not ideal as well because I was filming this video for something else and I didn't think I would use it for GS and what I have learnt from it is one should try to hold a camera in front of you, in average height and do not rotate it around its axis. Try to keep it always vertical. If you want to rotate, turn left or right, always do it together with your body. Roughly speaking, you should always be in the same position in your camera's frame. I will share a link with you as soon as I upload the original video on youtube.