Hi Dave!
Firstly thanks for replying, its a pleasure to get your help, ive read many of your helpful responses and solutions previously and they helped me with many software problems 🙂
I do have a good knowledge of both yes. It is a good point the pixel aspect ratio, ill check them again, but i dont think it is this. The reason being is if my workflow with tracking is PFTrack -> export to Maya (place objects) – Export frames -> Composite in after effects. i receive no wobble, this tracks extremely well and looks authentic. and if i use this very same PFtrack tracking project and do this workflow – PfTrack -> After Effects. – i get the wobble problems.
Ill have a play with the pixel aspect and get back to you, thanks again 🙂