The brother-in-law once struck the tractor, a strange noise is heard and it is unclear where it came from. He took it all over, invited local specialists, nobody could find the source of the scratch. I decided to sell it on the avatars. Buyers will soon come with their specialists. I watched, I heard the screaming. The specialist immediately, "you have that which is broken, we will not take" well and showed that it is broken. The brother repaired it the same night. and did not sell. I need this technique myself.