Please discuss here all your remarks and pose your questions about all racing series, except Formula One. Both technical and other questions about GP2, Touring cars, IRL, LMS, ...
Emailing a GP2 team might not be as helpful as emailing the manufacturer of the car. With the car being spec, I don't see a reason for the teams to have CAD drawings, let alone a reason for a drawing shop at all.
Dallara makes the car and their GP2 contact on their site is listed as David Beck. Dallara
Before I do anything I ask myself “Would an idiot do that?” And if the answer is yes, I do not do that thing. - Dwight Schrute