Increasing length of pull

I increase LOP on almost everything I have. Sometimes I just add a super large slip over butt pad thingy. I find most guns around 13.5 " or so LOP. I like 14.5 and even longer. I am 6'4" and have a head the size of a 5 gallon bucket. Some of my shotguns, I have added a much as 1.5 " for as much as 15.5 " LOP / Here is a pic of an inch spacer I added to my latest PCP , a Wolverine B-Lite .25. If a rifle or gun does not fit , you have a fit. I am a hunter not a shooter, I like to pull a gun to the shoulder and find I am on target.