I was wondering how to take off the oem shiftknob, and if there something specifec we have to remove/unscrew. Today when me and a friend were trying to install my headunit and had some trouble installing it. We got the console off, but had to work around it as the shift knob didn't want to come off. We both took turns trying to twist it off, but the darn thing didn't budge. Removing the knob would make things so much easier and faster. TIA.