Something of interest perhaps, during my last trip to Africa, at some point, one of my 1Dx Bodies sustained a damaged Focus Screen, no idea how this happened, although I'm not particularly delicate with my gear (to me they are just tools for a job), I generally don't drop the gear or knock it about unduly, so how/why the screen broke I cant tell, the screen broke along the lower edge, shows up in the viewer as a Black shatter mark as you would expect from broken glass. Don't know if anyone else has had this issue ?? have to say it's the first time I've ever had to send a Canon Camera back for repair for something like this. Fortunately it was only about the lower 10% of the view finder that was affected so the Camera was completely usable still. I've drowned a 5D & 2 5DMK2's over the years (Underwater housing leaking, at depth, solved that issue by switching from Subal Housings to Seacam Housings), but the screen was surprising.