Hey FRiend, First of all, your lock panel, while suitable for a late period percussion Mountain rifle. Second, you have not discovered the use of 3:5 proportional dividers. You can buy a copy of "Seeing Through the Eyes of Yesteryear" by Pat Hallem - or check out my latest book. Your dividers, after you have made them, along with Patrick's - or my book, will help you to define your cheek piece - or any other part of your stock. Regards, Peter A. Alexandert