I have sold at least 9 CF-52's to mechanics,I'm on one now and it has rolled out of my truck about 4ft to the concrete,no problem. Sold a hinge for one to a guy who tested armored hummers,they were offroad and the 52 flew across and smashed into the pillar with the lid open. Replace hinge and speaker cover and it's still running.
7 of them went to one diesel repair shop in 3 orders,he ain't killed one yet. Got 2 from Afghanistan,US Army engineer unit. They managed to punch holes 1" + in the magnesium lid on both of them.Still running.
I am an Army Engineer currently getting ready for another trip to the sandbox. I can honestly say from experience that a 1" hole is pretty surprising- it is usually much worse. Breaking stuff is what we do best.....usually with C4!