Neutrik jack on Recto cab?

[Nitrobattery]

Have any of you guys retrofitted your cabs with these? If so, how much bigger did you need to make the holes on the back panel of the cab?

http://www.neutrik.us/en-us/plugs-jacks/locking-1-4-chassis-jacks/

 

[Triaxstasy]

the holes needed to put these in have to be 25mm in diameter....