I'm confused about the fretting hand position. Most tutorials tell me the position should be pretty much as for regular guitar: finger tips on the fretboard, fingers arched, wrist as straight as possible. But when I watch other players, they seem to be not arching the fingers at all, but rather the fingers (and all or most of the hand) seem to be laying flat across the strings, not arched using fingertips. I know a bit about muting, but if this is the reason (a) wow, that's extreme muting, and (b) why are we always told to arch the fingers, without mention that later we often won't? Here's an example from a master to show what I mean. Look at how flat his fingers/hand seem to be on the fretboard... !