Fold amount goes by the weight of the paper, so, if it's plain paper and 80GSM, the values are:
Pro 35 = 50 sheets
Pro 50 = 50 sheets
As soon as you increase the weight, the values drop, and Coated stocks reduce it greatly. They (Plockmatic) don't seem to quote the specs for anything but 80GSM uncoated.
I'm trying to print a booklet with gloss cover and offset text and finish on the Plokmatic finisher. I get an error saying "Finishing (DFA Finisher) not supported by selected media (Plain Coated). It will print and finish if I print all on the text, but not if I choose a different stock for the cover.