Sweet!! One of the really cool things about POV is that you can make your work extremely modular. You can define a single shape for the guage outline and reuse it many times for the different guages, just with different insides.
If you draw a plane, you can just do one wing, one elevator, etc., and mirror them across the fuselage. Note: there is no "mirror" command, so you "scale <-1,1,1>" for mirror effect, for example if you wanted to scale across the X-axis.
Doing this can save you a lot of time in modeling and will reduce your POV parsing time, speeding up the rendering process. Can't wait to see more and learn more great tips Voss!