This is the second section. The changes are the same, differing only slightly at the end.

Cmaj7 - all Em pentatonic this time.
Cm7/F7 - this time I'm using the Dm pentatonic, which is the other substitute over a 2-5 in Bb. There are a couple of passing notes in there to keep it interesting. Also, to be honest, because it falls under the fingers more easily!

Gmaj7 - this time I'm using the Bm pentatonic (which will slide into Cm in a moment).
Bbm7/Eb7 - into the Cm pentatonic, ending on a Bb. Cm is the other 2-5 substitute in Ab.

Am7/D7/Gmaj7/Em7/A7 - Bm over all these chords.

At the end there's a simple riff to end up with.

Do you see what I'm doing? I used the '6th sound' pentatonic in the first part in all the keys (Em for G, Gm for Bb, Fm for Ab) and the 'maj7th sound' pentatonic in all the keys in the second part (Bm for G, Dm for Bb and Cm for Ab). It's simple, effective, and easy to keep in the head when you're playing.