I am new to the site and unfamiliar with your practices. My experience on DSOs is all through remote imaging starting in June. My only DIY experience in my light polluted, view restricted Washington, DC location is planetary drift videos on a homemade 6" Dob I built 22 years ago.
I put in a simple first request for 1 hour each of 300 sec exposures in S2, Ha, and O3 on the Heart Nebula from your OSG46 unit in Italy. On FTP I see generic bias, darks, and flats directories but none of the flats match my exposure length. I also see a directory for Poseiden-M Pro with sub directories by temperature and bin. My guess is that I should select the temperature subdirectory that matches my lights (-15 last night) in this directory, and the bin1 subdirectory for my calibration files. I would select the 300s darks. I see a variety of autoflats for different filters. None of them match my exposures but I don't know if that matters. Absent further guidence I would just grab the auto flats and bias frames in the -15/bin1 directory and use them.
If someone is monitoring these discussions, can you give me a bit of beginner guidance on calibration frames?
As an aside, looking through the FAQs I saw something about this network starting out in the Dolomites? Are you still headquartered there? It is one of my favorite areas in the world. I have been on two bike tours there.