Hello,According to many professors and professionals it would seem that there is a distinction between finger-strength playing and arm weight.However it seems to me that these are two different ways of talking about the same thing, and I think that arm-weight is even a bit deceptive. However psychologically it helps one to broaden one's sense of touch. I mean think about it. If one does NOT use finger strength, then logically when one "drops" ones fingers onto the keys they would collapse and slide off the keyboard. If you let your arms's weight rest on a key, how are you holding your hands up? by magic? no! you're using finger strength.My point is, perhaps a lot of pedagogical ideas and teaching methods are realy psychological and often avoid talking about whats REALLY going on physically. It seems to me that both approaches can work in different people. For me, both ways of thinking about it seem to work well for broadening my sense of touch and technique.