Hey Leo, long time no hear!
Your tracking looks great, especially considering the quality of your backplates. If you feel you have jitter, try smoothing out the camera curves manually in Maya.
What was your pixel slip in Maya LIVE?? (it'll be a figure in a box under the solve menu set). Ideally, you don't want it too high....around 0.4 is a really good result.....don't worry though if yours is high!! The tracking I do has to be pretty damn good, so we have to be accurate. Your effort is great, keep it up mate!!
LisaG