ok well also this project doesn't make sense at all, even at 30 pieces just the esp32wrover+usb serial are as expensive as https://www.aliexpress.com/item/1005001621990623.html
which is already really space optimized, as a general devboard module. pcb + usb-c connector + other parts + shipping on top that for what, black soldermask and some custom squigglies perhaps?
so,,, yeah,, no way I'll get it produced as pretty as this :(
will probably have to scrap both ENIG and the castellated holes (the outer, half-cut ones)
might end up doing blue soldermask (with silver surface finish, and no castellation)