[wandrr]

Paul Cross fixed mine a few years ago. As I recall, he used a long 4x4 with a cross piece (2X4 about 12 inches long) on top. I think he simply pushed that tee-shaped assembly in under the slightly retracted slide out, which raised the slide out enough to replace the Teflon block. Could be wrong - it was a while ago.

While you are at it, you might consider adding another panel of some slippery material on top of the existing white stuff on the bottom of the slide. Paul used a second layer of white stuff, but Plexiglas might also work.