Would you ride with a 1 " slight crack and indentation in the fork steerer, if you had an expander fitted to the top cap? The crack has possibly been caused by an overtightened stem bolt and runs vertically, adjacent to where the stem clamps onto the steerer. I can feel the indentation/ridge with my finger if I stick it into the steerer. There's a pic I can upload later on that shows the steerer... currently at work. Have been off that bike for the past 3 days as my instinct told me not to risk it but riding the creaky B bike is doing my head in, especially in this nice weather! I am 90% sure everybody will say "No - don't risk it", just wondered if having the bung inside there would mitigate the risk of it going crunch?