[Ratsack]

Welcome aboard, Ratsack!

Creating a new aircraft like this, although it involves weapon and flight model changes, is not "above board". You can find in the downloads section a Spitfire Mk1 with its own unique flight model/weapons.
...

So let me see if I have this straight.

Modifying the performance, damage model or weapons of an existing type = bad.
Making a new type not currently in the plane list of the stock game = OK.

Is that right?

If so, we - sorry, that's the royal 'we', meaning one these excellent modders - could make a new plane, called the Bf 109 G-6/U3, or G-6_44 or something, give it the weapons options and 3D model of the current G-6_Late, and give it the FM of the current G-14. That would amount to a 'new plane', wouldn't it?

cheers,
Ratsack