Thank you for your erudite and professional contribution to this thread, Capt Beeky. My concern is at the attitude of those who consider that damaging their employer's property is a trivial matter. Flight Instructors have a responsibility to set the standards to which their students should aspire - instructing is not just a way of passing on a couple of hundred hours of accumulated wisdom whilst waiting to join an airline. And that damage may not be so trivial - remember what happened to that Robin pilot who thought that his slight brush against a hay bale at Kemble was of little consequence? Or were you still in short pants at the time?