Just to let people know about my 7D2 failing after 2 months with about 4-5000 clicks. the camera was fine with mixed results up to then some very good and others not so. I mainly use it on aviation, ground and taxi shots were spot on, in the air not so 50/50 put that down to getting use to the camera.
Went to RIAT for the 6 days and on the third day got err20 did what the camera said managed another shot same error did this 4-5 times then gave up luckily I had my 6d that my son was using he went back to his 40D.
So day 4 tried the camera again worked as it should so used it for the rest of the show but after getting the images home not great.
So off it went to H.Lehmann for repair got it back after about 10 days and they replaced faulty/damaged shutter unit, Replaced mirror box assembly and carried out complete calibration to spec. So all I need to do is get out and test it not had a lot of time since getting it back but here's hoping I will post some pics after testing if all well or not.