I've started using TRACTOR and I'm recording my vinyls to digital. I've noticed that there's a lot of fluctuation in my bpm's from SOME of my vinyls, not all of them. I've looked at some of the same tracks from cds and there's no fluctuation. I'm using proper 1200's, I also tried it on a Vestax. I've tried various adjustments of the weight on the needles, but there's still a lot of fluctuation from certain records. Could this be a flaw in the pressings themselves?