Watch the Big Picture online guitar lesson by Brad Carlton from Chord Studies: Slash Chords Vol. 1
This example links to the previous Phrygian progressions we've been using by taking the high two chords we played in the previous example and making them the lower two chords. We've already covered the A to Gm/A move, so then you move up to the ninth position to grab the A chord which is derived from the top of a C form. Move up one position and add your third finger and you've got your Gm chord with A in the bass. The big secret is to visualize the big block chord forms and derive your inversions from them on different sets of three strings.