Here are some general MIDI settings for the ES-8 in relation to the Strymon Big Sky.
Also a quick way of assigning a SOURCE PC# on the ES-8 to TARGET a BIG SKY PATCH.
ES-8 SETTINGS:
LSB = OFF
MSB 0 = 0 to 127
MSB 1 = 128 to 255
Target BIG SKY BANK NUMBER x 3 + 1 = CORRECT ES-8 SOURCE PC#
For Example: BIG SKY - BANK 20 Patch A = MSB 0 PC#61 on the ES-8