Replace that nasty mushroom shifter!

[Boxtaboy]

The ones that just pull off with force are the standard knobs. These included the older/early model mushroom like knobs, and the newer ergonomic knobs that look like they have aluminum on it, but they're actually painted sections. The upgraded knobs are made of real aluminum and leather, and they look like the ones posted here with a ball shaped knob with half of the ball in aluminum. That's the one I have too. These are much more solid/heavy and substantial in feel, and also have the advantage of never scratching off as the painted parts on the standard knob does.

Finally, there is a third knob style that is made for the S models that is also ergonomic, and has a real aluminum slab on the knob. All the upgraded knobs have a set screw to allow for height adjustment.