Thank you Mark for your kind comment.
Brian, the radial engine is great, I would consider to drop the background though ;-)
And you're right, planes are a pain, the IL-2 took me quite a while yet,
but it is a welcome exercise for me to get comfortable with MoI.
If you don't consider the logic of sweep, loft and fillet you sometimes get surprising
and frustrating results and you eventually blame MoI for it which is wrong ;-)