Hey. So I'm thinking of getting a Warmoth rear routed body and putting some really nice pups and a pre in it. Just wanted to know how big is the control cavity? I know it will fir most preamps, but I'm specifically looking towards installing a Mike Pope Flexcore in it. It's a kickass pre! Also, would it do any harm if I drill the control and pot holes after the body if finished. I'm going in with a chambered Walnut body with a maple top. Thanks!