Really nice work! I recorded some printing presses last year, and found the big industrial ones to be incredibly challenging to get just right. I was really running and gunning in a massive industrial complex though. Sounds like you had the opportunity to sit and do a study on one machine, which is very cool IMO.
What was your recording setup?
@Rene Yes, I did have the opportunity to study the Heidelberg printing press before I could record. The owner of the press was very kind enough to let me and a friend come over to their facility and record for a couple of hours. We took multiple takes of the machines. I used the Cold Gold large suction cup contact mic, Sennheiser ME66 and Sound Devices 722 and recorded different perspectives of the press and then combined them together.