I have an SR3020 that is giving me some difficulties...everything works perfect on this finisher except when trying to saddle stitch (Fold) 8.5x11 SEF. It doesn't jam everytime but its pretty frequent. What looks like is happening is the feed out belt pawl is catching it wrong and wrinkling it all up so as it is lifting up it just gets all wrinkled and jammed in the folder unit. I am not sure what to adjust though because it works and folds perfect, NO JAMS, when i am doing 11x17. The registration looks good, when they do come out without getting jammed the fold is perfect, so i'm not sure what it could be, any advice?