I'd appreciate any tips on how to approach a tune such as Monk's Well You Needn't. For those unfamiliar with the tune, the head is played over alternating measures ot the I chord and the #I chord. I've seen it in the fake books as either F6 to F#6 or F7 to F#7. My question is; in this tune (and in other situations where there area repeating, alternating measures of the I chord and the #1 chord), would one "walk" alternating between the I and #I scales, or is there a "hybrid" scale (say, incorporating a minor second and a sharp fifth) that would be used? I guess the same question would apply to soloing (on any instrument) over these changes. Thanks in advance for your ideas on this, as well as for all the great info I have gleaned from this site.