Thanks TS. Found a suede boot I like that matches my interior and new knob so I’ll give it a shot.Not a lot, actually. The bottom of the factory boot has a black inner ring that the boot stretches over (see my JPM story, above). Then that clips into the chrome outer ring so the pleather is sandwiched between the two. So you'd just pull the aftermarket conical boot down over the black ring until the diameters match and it is tight, and then trim off the excess below.