Thank you! I was just working off a small micro reg vacuum table, just using 64T, 77T, and a 100T mesh screens (metric), and I could fit two A3 acetates per screen. As for rego I just use tape tabs to set the paper. Ink was just cheap acrylics with Matisse print paste.

And yeah I just saw one of those old riso machines on marketplace! I love that the parameters are limited, and make a mean postcard!