I printed it with tree supports in Cura since PS still doesn't offer them. 

The small side mount uses these 16mm buttons
https://www.amazon.com/gp/product/B08SKJ6V7Z/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1

The zero delay that I used, but I'm sure hole placement is pretty standard
https://www.amazon.com/gp/product/B00UUROWWK/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

And for the side (flipper) buttons are standard Amazon arcade buttons
Mounting hole required: 24mm - 28mm