Hi. I was totally clueless about how to do the transformations until I had taken the Intro Photometry and the Vphot courses offered tis year. At this point, if you wish to pusue photometry, taking those courses when next offered might be a good investment of time. The instructor for the Vphot course, Ken Menzies, posted a very detailed set of instructions for using Vphot and the separate software, available from AAVSO, called Transform Generator, or TG. This can be found in the Aug 27 2024 post in the Vphot forum.
Good luck.
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