Fortunately, I wasn’t able to find a solid 1440s press so I’ll try to model it as close to the original as possible but with numerous interpretations and “artistic freedoms”. For the instance: it feels right to me to give that press a descent standing place. It looks almost like a temple entrance or a sacred monument and requires some fundamental base to be placed upon. These first books were like relics after all.
Plus here is a good one to dive deep into the history of that printing process: