, your drawings lack shading and have other "wonky" features (such as the inexplicable "kink" in the windshield of your ERJ there). They seriously make me wonder if you've actually studied the plane in question or just copy pixels on "blind faith" without factoring compression or other distortion errors.
Your A380 is another egregious example, although your A320 lacks only shading details. It was for these reasons that I declined to suggest them for upload into the database. Furthermore your drawings have only minor issues that need attention, but are still enough that I would not be able to recommend them for inclusion into the database. Your ERJ is the best drawing so far and has an adequate level of detail and shading, but once again, the windshield "kink" is strange and I can't find any reason to rationalize it.
As a final note - and this is strictly both optional and a personal preference - if you are to do a "blank" airplane I recommend doing so in a "white tail" scheme as I posted my A330. The specific reason is that I've observed Gollevainen have a preference for real-world paint schemes (which "white tails" qualify for) and he's much more hesitant to upload a generic gray scheme as you have.
Anyway, this is the final A330 I'm going to do. If someone wants to do an MRTT (or another airline), knock yourselves out.