Chisel along your wrist line then chisel out some of that comb ....and repeat ....just keep on doin it until its down to or close to the line you drew on top of the comb . That line on comb is a reference point for me as the line should be a bit rounded , not straight . Now .... Be careful and see how your grain is running , when you find out might want to leave a note ...the one side on here I'm buckng the grain going towards the front , goes DEEP ....gotta be careful ....so I turned the gun around went in the other direction so I dont accidentally go too deep and pop out a chunk and ruin the stock .... Stop at the line I'm pointing at , no chisel work from there to B.P.