Would like to get the recess cover off my 1919 BSA Light to see if by chance he stored the rear sight there when he settled on using the aperture. Easy to get the 2 screws out but the cover won’t give. I’m sure it’s been in there for 90 years. Any thoughts on a method without breaking this old wood? Really don’t want to risk breaking the piece as I will be using the aperture only as well. Not worth undue risk.