If I remember corectly the Problems with the TU-2 were not realy the absence or lack their of of good Cockpit referances, but of all the other gun posations ect. on the plane, also the fact that the rear ventral gun used a perescope to sight with was an added problem modeling wise, now this is just what I recal reading, I maybe all wet on some or part of what I just said...but that is what I recall.
