Hi again.I

Are you trying to make a gauge? Well, although you might not be able to make a throttle that will do like you say, the user can control this behaviour directly from FS itself, so it might be a moot point. The user can select individual engines to control, or he can control them all at once if he likes.- Martin

Take a look at the Baron's "Engine Controls Unit.xml" and just apply that technique - can't think of a reason why it shouldn't work.Basically; read click/drag, then apply to all engines.