Just downloaded the chromatic version of this and it does a really nice job. I don't think of drones as a crutch at all, but rather as a tool. One of the things I try to impart to all of my students is that every interval has a "sweet spot" that can be heard but also felt through the hands and wherever else the instrument touches the body. Practicing with drones is a great way to heighten awareness of this sweet spot.
I also disagree with the notion that practicing pizz somehow "isn't practicing", but this debate is ages old and not necessary to have in every thread about intonation. Players obviously benefit from doing both. I use drones to practice pizz often, and find the exercise very useful.
I also disagree with the notion that practicing pizz somehow "isn't practicing", but this debate is ages old and not necessary to have in every thread about intonation. Players obviously benefit from doing both. I use drones to practice pizz often, and find the exercise very useful.