I wrote about this exact experience two years ago in one of my columns. You can go to
www.markearzoumanian.com. Then click on "Love of the Hobby" and when you scroll through the columns you will find one that covers this subject from November 2020. It's called: Converting GAIs to PSAs: Lessons Learned.
Yes, I know I am biased BUT I think it is worth reading! Take care and glad to share. Peace.