Hi tpmar
You'll have to help me out here what is 80 paper. I work in metric do you know its weight as gsm. If it is very light stock you could try adjusting the amount of registration buckle. If you go in to the Adjustment for skilled operators, go to the paper feed and output in menu 0303 you can adust the amount the paper is pushed into the registration gate, minus is less buckle plus is more. Also in the advanced paper settings you can adjust the registration gate timing i think its setting 114. I use this setting to help with skew issues on very heavy stock especially at SRA4 or smaller.
Also try turning off 119 it causes a lot of issues, the engineers that I deal with advise people to turn it off.