coha

Yeah exactly! I started that book back before I was probably ready for it, but I do remember doing the single string exercise. I'll have to see if I can get a hold of a copy

I've been doing a lot of limitation practice when improvising. It has helped me see new possibilities because you're forced to try things you might not normally try.

Here's Jack Gardiner talking about it: https://youtu.be/eAKAL_H6390