I am one of the few people at the newspaper who works on both systems. A couple of copy editors endured month-long tryouts. In my case, I was hired over the phone, without an interview. There is no such thing as training in the literal sense of the term. When possible, one person will watch another person do a job for a couple of days, and then is turned loose to do it themselves.
Extra pages are okay.
Please send me any and all information about the ACES group being formed. I am very interested in helping start a chapter here.