As usual I am a bit strange. I used to do a lot of one-handed practice, and still do for purely technical issues on the silent clavier. However, in recent years I have begun to explore the way the brain perceives simultaneous movement of the hands, coordination, independence, rhythmic interaction and so on, in terms of musical effect for my improvisation. More and more, I have come to feel that I play with one big hand with ten fingers, at least that is the illusion I get. It probably comes from the fact that improvisation allows very little time to think about hands and fingers individually; everything just sort of happens and various parts do duty all over the keyboard. Any physical decisions involved I prefer to turn over to the lower level hardware, so to speak.