Sugoi work again JC-chan, forgive my impudence...
Just a quick query, might the asymetrical cowlings appear less symetrically centered and shaped - as you say most drawings are truely wrong, and from what pics of Gustavs and Karls I've seen.
The larger MG131 breech covering Beulles/Boils/Bumps, do sometimes seem more or offset to the port/left than many drawings suggest along with shaping differences between left and right sides of the cowlings, from their midline to rear end.
Though this could be ascribed to my aging eyes ingame using free-look mode and perhaps the differenig cowling patterns used (in photos) from different factories/assembally plants as IE suggests; to whom, (Ice dude) a few choice smudged/stretched brushed (not penciled..) on lines upon a new layer can simulate very well the aft cowling overlap-shading/vent-area to fusalage shape.
Apologise, I don't wish it offend your needed 3D skills or hobby time JC. Arigatto, Kanpai and 'Guts-da'
