Hi. Thanks for the answer. However, the "rich a bit" or "lean a bit" are still far too much movement for my tastes. There must be somewhere, in a prf file or whatever, that determines how much the F-keys move a control. I want them to be even finer that "a bit". I hate seeing the mixture gauges moving so fast, even with quick taps of the key, that I can't select the settings I want.
Yes, I can manipulate the 3D levers, but that is not always convenient to do, hence my need to get the F-keys working better.