I have a 1D MkII that is just 4 years old. Two years ago, the shutter broke and the whole shutter box was replaced, after some 63000 activations. This weekend the shutter failed in the same way (a blade could be seen resting diagonally in front of the sensor), this time with even fewer than 60K activations since the replacement. I am having it repaired again, but somehow, I feel that there must be something else wrong mechanically that puts strain on the shutter. The specs call for 200K activations, and the camera gets heavier use by sports shooters, bird shooters and PJ's than what I do with it.
Any thoughts?
Also, has anybody replaced the plastic LCD cover on the back of the camera? The part is fairly inexpensive (about $12 from Canon), but how does it get glued back? Mine has some scratches, probably caused by the strap rubbing against it in the camera bag, and I find it annoying. I chimp a lot and the abraded area is prominent in the frame.