I am trying to learn about my recent 1999 Boxster. I was looking into the shifter today and considering a short shifter mod. Mine looks modded. .It has a set screw that is very hard to turn and the leather it snuggled onto the knob with zipties. It seems the knob will not just pull off. I am curious if has been cut down. It is a tad over 6" long from the top of the white piece to top of the knob. Not sure if the knob is original. How tall is a stock shifter?