Owners' site posted for sale a heated pitot tube; my current one has a slight ding in the nose, mostly a cosmetic issue. So I purchased and when it arrived it looked in great shape. However prior to final installation, I went to record its serial number...no joy, it had been scratched out. Nope, not going to put that kind of a part on my build. Seller was quite responsive, didn't realize it (inherited it in a box of parts), and is refunding my money. Will use my original. Recording an hour, but much longer in terms of study, investigation, initial fitting to the mast, etc before I realized the situation.