Well I've just fixed the broken chrome button on my shifter and now need to fix the "calibration" of the shifter. It's very bad, the oranger markers next to
The brake on the shifter (I mean the thing that stops you from sliding the shifter past D). The brake is now on N instead and sometimes moves to R. Also the orange markers on the shifter surround (P R N D 3 2 1) don't line up correctly with the selector. This isn't a sloppy shifter/bush related issue. The Gear shifter is out of calibration with the gear selector on the box (linkages)

Anyone know how to fix it? Cheers