MODEL? After forcibly pulling down the gearboot it reveals a plastic shroud until the base of the knob with little resesses for a screwdriver to flip it. Not sure how to continue as have a new leather gear boot but dont want to damage the knob as seems tight to turn and any case think I need to slip the new boot under the shroud as before to retain it just below the gearknob.iI need the knob off first to get the gearboot on .Thks