Well it hasn't been doing it lately for whatever reason (maybe the grease completely took hold?), but I have been getting tons of wind noise since I movied it slightly forward.
When I took it apart, I moved the shims around to make the sunroof level with the roofline - the back was a little too high up on one corner. Regardless, it was doing it with the shims where they originally were. Visually, the track mechanisms aren't perfectly aligned with each other, so I think thats whats causing the problem.
BionicKris,
Thanks for the help and offer, but I've got a Helms already
If it gets stuck again, I'll try to get a picture