Congratulations Eric, that's a super-sweet bass, and I guess you already know its story!
I wonder if there isn't a switch or rheostat inside the control cavity to dim/cut the LEDs. Might be worth a look. (Rob beat me to this one!)
Hmm. I probably ought to wait on the stereo/mono switch as none of my basses have one. Generally though, I believe to get the most of using a Series bass in stereo, you need to connect it's DS-5 outputs to different amplifiers.
Again, Congratulations. Wow, what a bass.
(I'll have to dig for it, but I think I have a picture of it at a Gathering a couple-three years ago... must have been a hatchling!)
*here ya' go... the subject of the picture is Nick's Hyak Scroll bass, but I'm pretty sure this is your bass slightly behind it... early-May, 2017.