FWIW, some time back Ron mentioned Ilan had suggested use of a "string.x" instead of sail.x in VSF to have response to wind direction, without creating unwanted 'sail' side effects like flutter, chuter, AP function, autogeneration of sailf.x, etc. It was evidently created for gliders/sailplanes to animate the 'woolyworm' relative wind indicators...which we rag sailors also use. It supposedly has no effect on sounds or dynamics, and would work for flags, pennants, and other non-sailing uses. So far I have been unable to find 'string.x' in tutorials, or models. Anyone else see this, or know it's specific application rules?