RE: Mini F-16 vintage project consideration
I've never built a fan shroud, especially one that needed to be perfect to close tolerances and light as a feather.
Quite a challenge.
Since the shroud is tied into the model's structure tightly, it needs to have a memory of it's original shape to withstand the bumps and bruises of the Real World without distortion.
As far as fuel is concerned, maintain an oil % close to 25% and 15% nitro is a nice compromise.