Hiya Mark.
Approached the Butt problem a different way, didnt drop the hieght in the end
What I didnt allow for, was the fact that the origanal Butt was so thin on the comb, where as my version was quite meaty.
So, after shouldering and thinking for a while, I desided to Scollop the cheek piece out, bit by bit with the spoke shave, until I got what I thought was a better, more comfortable head position that could be replicated shot to shot.
Here's the Butt now. ( Click pic's for larger view )
.....and another.
I have also added high mounts, my sight