One thing I found quite useful when using the turntable-potters wheel-lathe is some kind of steady-rest.
Think about that baton stick thing a lettering painter uses. Or the tool rest on a wood lathe.
One of the biggest impediments to precision work is holding your hand out free-style and trying to precisely control your movement.
I practiced using Medium's lathe doing pottery, vases, etc, and tried to make thin sections as smooth as I could.
I have a lab stand 36" tall with an adjustable clamp block I use to steady the hand while turning a piece. A tripod could be pressed into service too.
For the F-35, the jet nozzle becomes the centerpiece made first on the centerline and the rest is added to it afterward.
My attempt at turkey feathers is a monolithic shape that has the details painted on, and good luck to you if you try it with extra surfaces or parts.
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