Plockmatic 350 Booklet Maker skew adjustment

[APablo760]

I have a Plockmatic 350 booklet maker with a square fold and face trimmer that I'm using offline. Ive been having an issue where the facetrims are slightly skewed top and bottom. I've been been having to take my booklets and face trim them afterwards through our cutter. Is there a way to adjust the blade angle? It's roughly 1/16" longer on the top cut (inboard side of the machine) than the bottom. Please advise. TYIA