Wheel button plate, looking for help

[DaVeX↯]

Ok guys, I draw myself a button plate for my g27 + SRD9-C/M how it looks?
This is a 8 buttons + 4 rotary encoder plate...option 1,2 or 3? Buttons can be added later...
Do you have some blueprints, measure of G27 to share?
I want to add some holes to make the G27 leds still visible...