Glad to help!Many thanks for the wiring diagram. I have multi-strand wire that's (I think) 22 gage which should be perfect for this. Oh....button assignment - can you tell me how you mapped S1, S2, and S3 to the 4 buttons on the top keypad? S4 clearly gos to the trigger.
I ordered what I thought was multi-strand, but when it arrived, it wasn't. The wire I included is the kind I used in my Marvel Pager and it worked out well. It's just a little sensitive to lots of 90-degree bends back and forth.
"Mode" should be the forward large button (it's essentially a safety)
"Up" and "Down" should be the right and left tiny buttons (normally, they control the power level but when you're in "disco mode" the left one plays the Orville theme and the right one plays a random quote from the show. Note: to enter "disco mode", you need to hold the trigger depressed when you power it up (takes a few seconds). Once you hear the power on sound, you can release the trigger. Oh, and when you boot up.. give it a good few seconds to start. You'll probably hear a short bit of "speaker static" when you turn it on.
I put the power on button in the center. (You can change that if you want... and swap L/R too.)
I also suggest painting the insides around the LEDS and buttons black- partly to stop bleed-through.