Sorry if you downloaded the crap esp setup that had the standoffs. That was nasty, not sure why that was even done. Moved esp to box that can be screwed to bottom panel. This makes it easier to print bottom panel if you don't have esp.
Requires a handful of M2x10 and M2x12 screws/washers/nuts, drill, 2mm drill bit, 4 m3 screws, and an optional switch for disabling the high voltage if case is open. When finished you won't need a drill, but if you want to assemble it now, be prepared to drill and maybe cut (sorry, I just re-designed the way the things all attach to each other). Also includes faceplate for no OLED, and will include instructions for no ESP8266.
https://www.amazon.com/gp/product/B01LWXAC5E (50v 5amp buck)
https://www.amazon.com/gp/product/B0744BT79M (50v 15amp buck)
https://www.amazon.com/gp/product/B01MQGMOKI (mini buck (for esp8266)) https://www.amazon.com/gp/product/B01IK9GEQG (esp8266)
https://www.amazon.com/gp/product/B07KPYS8JT (rocker switches)
https://www.amazon.com/gp/product/B07H699FQV (banana jack)
https://www.amazon.com/gp/product/B078TPBHKD (banana plug)
https://www.amazon.com/gp/product/B07FCDL2SY (m* screws)
https://www.amazon.com/gp/product/B07CJ2Y739 (xt connectors)
https://www.amazon.com/gp/product/B01IOK5FM0 (24v 15a psu)
https://s3.amazonaws.com/dual-box/pcb.png (my custom relay PCB)
utc.t-0.dev (time service for esp8266)
I will post all of the ESP programming instructions. This uses a custom relay switching circuit that is driven by a transistor switch via the ESP 3.3v GPIO with flyback diode (you could use some assembled thing from amazon (or other) to drive the relay(s), I was just trying to save money). Will also include the diagrams for that which includes code to control from phone via wifi.