Ok, thanks for clearing that up. I read A.1 as a subset of A, ie costing MPs.
I have to admit, I thought that turning to face already triggered opfire, but I must not have been paying attention to what was going on.
I've since tried that out in the tutorial, and found I was wrong.
What a great game. What is it, 20 years old now? And still going strong. I started with SP2, which had been out a year when I got a computer fast enough to play it.