"And first, you got to remove all encoders. Just pull them straight up, not too hard, and don't let the cat play with them. Trust me. You don't want that to happen."
The 4 MN3008 (2048 stage BBD) chips are exchanged with MN3005s 4096 stage BBD). This doubles the delaytime, gives a little bit more analog (= nice) distortion when feedback is opened up. Also the opamps are exchanged with better ones.
It's just a simple pad patch going through the MM with maximum delaytime, feedback on 2 o'clock and a little pitch modulation from the MM added.