Also, if I'm not mistaken, there are instructions floating around on the net so you can hack your mk2s to remove the quartz locking. That's really the only thing that causes the sometimes annoying quick bump in pitch around 0. I've not done the hack myself but, if I recall correctly, it basically involves some simple soldering to create a circuit so, when a button or switch is pressed, the circuit is closed and the quartz locking goes into effect.