I've been working with this press for years. I recently replaced the lower feed roller with a new one, and it seems like ever since I have been having trouble getting it to feed straight. Seemingly at random (and approximately 10% of sheets on a given run) a sheet will feed skewed, with the trailing edge of the sheet skewed about 4mm towards the non-operator side of the press. So far I've tried adjusting the paper stop fingers (they are to spec) the feed roller parallel and overall pressure (to spec) and of course I've got all my feed table springs and wheels checked and double checked. One other data point is that this only happens with text weight stocks. When I print cardstock, it runs fine. Any ideas would be greatly appreciated.