I've mounted an extra guage too.
That is the point, the user fault.
Because there are too many rolls to unload sometimes more than 2 hours, and store them on top of each other it causes exhaustion for the driver.
So the reason I asked is, is it common for such a mistakes after a timely repetitive and exhausting job(maybe in 200 hundred rolls 1 drops.)?
If yes, is there any special tools, instrument or equipment for preventing this happening?