This one irritated me to no end. Far more difficult to gold than the entire rest of the A license. Beat my head against the wall over it for days. In fact, it was only that I was able to gold the rest of the license that I decided to will it to happen.
Can't really give any advice other than repetition. I got consistedn in the 20.2 range, often dipping to .1, but could not find that tenth in technique. I just stumbled on it eventually. I think it's a bad test, really.
I was using the DS3 sticks at the time. Also, full cockpit. (more interested in doing as a sim than simply doing it just to do it)