Yes (Common)
Yes (Common on long haul)
Yes (Part 1 Rarely, Part 2 occasionally, Part 3 Frequently)
Yes (Common amongst the "Mustang" engineers, they fix it with their P51 (Parker 51) pen)
Rarely (Except in the neanderthal management era when it was common)
Rarely (Except in the neanderthal management era when it was common)
and :
Much better to TRY to be good. If anyone ever achieves perfection, please let us know.
Regards,
Old Smokey