Very cool picture!

Well. After 9 months! I finally got Goliath up and running. Added a second F-1x and a DS-5R to the rack. The fretless neck is dead quiet but the 8-string has a bit of directional noise.  It's gonna take some time to work around 4 separate channels!  I have both pickups split with mains and ELF cabinets so lots of experimenting.  All side LEDs present and accounted for.

This is my first DS-5R. Can I use the front jacks to send signal to the F-2B? Or do I have to use the rear jacks?  I am getting signals out of the front jacks.

Use either set of jacks - we put them on the front and the back so you can take your pick.