(I also put this somewhere else, maybe the DIY forum.-SC) Okay: I am finally a member of the Hydraulic Fluid In The Armpits Club. That is, I finally got around to yanking out the CDV and replacing it with a bored-out version from Zeckhausen. In the Z4 M roadster, it's a ridiculously simple procedure. Click here to read a discussion of the advantages and procedures on other models; you can read Zeckhausen's analysis of the situation here. I noticed the difference within a block of La Jolla Independent, where Carl Nelson kindly allowed me enough lift time to perform this minor surgery. I no longer feel like a fourteen-year-old trying to master his first manual transmission! Best of all, the "ka-chunk" engagement of second gear---which I believe will eat the synchros sooner than later---seems to be significantly diminished. Michael Bird is currently writing up the CDV procedure for Roundel, as he is another passionate advocate of this procedure. I could have written such a story myself, but my hands were all slippery and I couldn't work a camera.