FYI, since writing that, the PCB arrived, the kid it was for used it for his final project, and it worked perfectly. So copying that schematic was a win. I can send you a streamlined version of the schematic (since the original has numerous options not relevant here, making it kinda hard to follow) if you want.
Would love that, thanks tooki!
I have school Monday and Tuesday, so Wednesday is the earliest I can get it.
What software do you use? If Altium can export to it I’ll send you that, otherwise just a PDF.