4 wheel tracking and similar are a bit of a waste of cash on the Omega, as it doesn't address the Omega's biggest geometry weakness - camber.
Bad choice of wording on my part, I should have said 4 wheel alignment (or 5 wheel if you include the steering wheel, because the company I have always used include it).
4 (or 5 - thats marketing BS) alignment is kinda pointless. All it does is ensure the fronts are in line with the rears, without any checking to ensure the rears are pointing the right way. Also, it won't cure the Omega's inherent (with age) camber issues.
Just so we're not talking at cross purposes again, as I'm not in the mood for another argument, here is the definitions I use:
Tracking - Front Toe
4 wheel alignment/laser tracking - As above, but ensuring fronts in line with rear (which may or may not be straight)
Ful geometry - Thrust angle set to zero, rear toe and camber (if adjustable - rear camber not directly adjustable on Omega) set, front toe, camber, kpi (not directly adjustable on omega) set
Hope that clarifies what I'm saying.