In FS9, I implemented a "mach3d.gau" into several high performance aircraft panels. This was a small digital mach display and I really do not remember its source. Unfortunately, it is not compatible with FSX panels. Does anyone know of a similar generic mach gauge for FSX panels.Thanks:RTH

Not quite that for which I am searching, but for what it is worth I have found the following:There is a gauge, "lat_lon_display.zip" in the library which does include Mach speed. It takes up considerably more room than the small gauge I referenced and would prefer that was in my original post, but it does include quite a bit more data. I chose to put it into a secondary window as follows:[Window19]Background_color=0,0,0 size_mm=350,100position=4visible=0ident=10003window_size= 0.350, 0.100window_pos= 0.000, 0.020gauge00=LATLON!LATLON, 0,0,350,100My shortcut Icon ("ident=10003") is from the "toggles.cab" file, again source forgotten. However, I believe there are several other toggle choices listed in the library.Respectfully:RTH