Thanks mate,
The line becomes apparent after stacking. the more I process, the worse it gets... I've noticed however, the edge with the line gets VERY close to the edge of the FOV (parallel with the line) for about 300 of the 700 frame AVI...
I'll re-process it later, but delete any frame where its close to the edge... Mind you, that avi, jup only has maybe 30px either side of it... just squeezes into the FOV
