Hmmm...I don't know that either. We had EAW "style" props before Woolfman re-did them,that used the same spinner as the PAW 3dz. and thus were easier to skin the spinner as you wanted. The MiG 3 still uses this prop. I'm not very knowlegeable about this part of 3dz editing so I don't know what it would involve "redesigning" the spinner for the Yaks.
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Joke em if they can't take a....