Trying to run 16 pt stock on our J75 (admittedly out of spec for our printer). The job is 2 sided but we are getting really bad front to back registration so I’m thinking of trying to manually flip for the other side. Weird thing is that it jams on every sheet if I DON’T duplex. Totally counter intuitive. I have a work around idea for Monday but I’m curious if anyone can explain the reason for this. Also any tips for holding better registration on super heavy stock?