Hey, everyone. I'm able to play rootless shell voicings (3s and 7s) on my middle two strings now for when I play with a jazz trio, but I'm finding it really difficult to find the extensions consistently. I keep switching the strings where the fifths and ninths are around in my brain, and because they switch automatically during a mII-V7 progression, I'm having a really hard time getting this down.

Does anyone have any tips, exercises, or progressions I could practice to help sort this out? It's a big stumbling block for me. I've been going through the Real Book trying to play shells and extensions for all of the tunes, but I keep thinking there has to be a better way.

Doogie