Hi, this is my first post to this group. I just bought a yamaha SK20, and I must say I love this thing! I am curious if anyone has a service manual for this thing (nothing is wrong with mine...yet..) and/or if they know a way to detune the saw 'string' section relative to the polysynth section? The polysynth detune knob seems to affect both, and since they sound pretty sync'd to eachother I'm pretty much betting that I can't, but it would sound so much nicer if I could! Thanks!