I have tweaked the design slightly (nose cowling area, wheel spat rivets) and finished the changes needed for the 'bis' version, so I should have maybe a dozen eventually...
These are the final 'standard' versions - except the Chinese one... they got something like prototypes, which lacked the cooling fins on the nose...
Interesting question, and I don't know the answer - logically you would always have a vent for smoke, and there is probably a lot of pressure there too...
The only thing that springs to mind is the Hunter which has smoke nozzles above the cartridge collecting fairings: