Here’s a great jazz guitar exercise to practice for learning your major and minor sixth jazz chord voicings. Basically you practice switching between Gmaj7 and Gmaj6, and then Amin7 and Amin6, and then the same thing with Cmaj7 and Cmaj6, Dmin7 and Dmin6. There is also some movement of the minor 6 chords to outline a III-VI-II-V-I chord progression.
I originally learned these chords from the first Mickey Baker book. You can get it here: https://amzn.to/2NIt4L
Here are the jazz chord voicings from the video:
There are some other minor 7 and minor 6 chords in the video, but the voicings are the same.
