Harry, may I ask you why you don't use your router for the deep cavities like the neck pocket or, here, the control ... cavity ?
I've always used a router for this, in multiple passes, of course. To me, it's easier and faster than drilling holes first.
You certainly have a very good reason for this way of working, but each time I'm watching your great work, I'm wondering why...
And as ♌ too, like me, don't take it the wrong way. 😉