I purchased a new Bach Strad 72 Lightweight a couple of weeks ago. I am not trying to be over paranoid, but the pistons seem to be extremely scratched for a new horn inside. It was certainly not like this when I got the horn but they have appeared. I have oiled the horn regularly, every day that I am playing, and when I bought this horn I got some Ultra Pure, so that is the only oil I have put on this horn. It is my fist experience with Ultra Pure so I'm not sure if it reacts with my saliva or something...There are surface scratches that go verticle, in the direction of the valve movement and then there are some that look deeper that go diagonal and cross each other. Is this normal and part of a break in period? I have been having a hard time getting good pictures of this with my stupid point and shoot digital camera (I'm a film/analog only shooter) but I'll try to put some up.