I adore my A4QM Avant, but the shift knob neither looks nor feels particularly good. (1.) Can the knob be removed without damaging the stalk? If so, counterclockwise or otherwise? (2.) Are we talking about a standard thread size here? (3.) Any suggestions for sources of walnut aftermarket shift knobs that will more or less match the wood trim? Thanks. Shaun Mullen West Grove, PA