I had Alex's ssk fitted to my 40 Jahre a week or so ago - and wow, what a difference. There wasn't anything particularly wrong with the oem shift other than a little bit of slop, but this now feels so, so good. As others have said it transforms the driving experience, from 'ok" manual shift to what feels almost military grade in quality and precision - like a properly good gated manual just without the gate...... wish I had had this on my previous 996s