I've been working on a lot of thumb position technique exercises lately, and have made a good deal of progress. For exercises, I've been using a mixture of Petracchi and basic scale studies, then just working on playing tune melodies an octave higher than they are often written/played. I have a great teacher who is helping me with left hand position, and I'd never have made it this far without him. However, since he's an orchestral player and almost always plays arco up there (while I'm working on pizz technique almost exclusively), there is one issue where he admits he has little experience - "hammering" pizz notes. So I thought I'd check and see what some other jazzer's experiences might be. Basically, I often practice a fingering concept when working on scales in which I group fingerings in twos with no open strings, so that the second note of each group can be "hammered" as a legato phrasing with no RH attack if I desire... then I shift to the next group and do the same thing. Descending, I'm working on "pull" techniques to achieve the same effect, although this is much harder. I find that in the lower positions, this is *fairly* easily executed by using arm/wrist rotation to supply the power while keeing the fingers relatively stationary - a concept I believe is very important for stamina, consistency, and longevity. However, up in TP, I find my leverage much more restricted, and while I can still execute the technique to some degree, it doesn't feel as strong as in the lower positions. Thoughts about different ways to approach this? Also, up in TP, I am often unsure how to rearrange the note groupings and when to shift if I want this legato effect, since up there the traditional groupings are of three or four notes. I've done some experimenting and come up with some useful workarounds, but was wondering what others might have experimented with along these lines. The important things I want to maintain are an even, solid tone and good intonation. Any thoughts/comments/anecdotes anyone would like to share would be welcome. It's exciting territory, but a hell of a lot of work!