A couple of weeks ago, I had a 4'X8' print to contour cut. It was printed on 3M IJ180cv3 cast vinyl and laminated with 3M 8515 cast laminate. My plotter is a Summa D120. I loaded the vinyl in the plotter like a big sheet and fed it forward enough to see that tracking was OK. I sent the file and the plotter fed it all the way to the end as usual to make sure there was the proper amount there to cut and it started cutting. During the cutting, the vinyl became terribly skewed. Before I could stop it, it was cutting where it should not have been cutting. I reprinted and laminated. This time I mounted the 8' print on an empty core and put the flanges on the ends of the core and loaded it on the plotter. It cut perfectly this time. Yesterday, I had another 8' print to contour cut. I attached it to an empty core and again put the flanges on the core ends before loading it on the tracks on the plotter. It finished about 90% of the cutting and again became badly skewed. I DO NOT think this is the fault of the plotter. I think that the laminate is attracted to itself on the back side of the plotter where it makes contact and that causes the problem. Is there a tip/trick that can solve this problem? Should I not be using the flanges that came with the Summa plotter? Thanks for any suggestions.