Again, being a novice...but spurned on by all the threads I now have a series of mods I'm going to "try" do myself. However, I have a small one and I need help. How do you change the shifter knob. I tried unscrewing it, but it the knob, and the entire piece of metal (I assume) which screws into the shifter. Does shift number piece (on top of the shifter) pop off, exposing a screw? Or am I completely automotively incompetent?