I've been working on sight picture and cheek weld with my new rifle, and I can't seem to get anywhere near a proper cheek weld. If I do, I'm staring straight at the back of the bolt. This is with low DNZ mounts and a 40mm objective scope.

Apparently I have somewhat high cheekbones, which, combined with the slope of the Accustock, is causing me problems.

Before I go for a Karstens adjustable comb, is there anything else I should know/try? The thought of taking a drill to my new gun is a little sketchy.