I just obtained an early 80's Davidson Discovery (touring frame) 57cm frame and components all in excellent condition. Upon removing handlebar with stem I looked into steerer tube and it was closed at the bottom with a wine cork. Frame was sold out of the excellent Cupertino Bike Shop, CA. No rust was evident inside steerer tube. Some moisture in grease however was evident. So my question is this a good idea to do. I would be worried about cork absorbing moisture and rusting steerer tube to point of failure. Specialty in a area like Seattle. Comments please Charles Nighbor Walnut Creek, CA