Be careful, the bab leather grip is going to add more weight than you want.
To pop the buttcap on a bab is SUPER easy. Just grab an awl or small screwdriver and press it into the little hole in the buttcap. Then you just push forward so it leverages the cap out. It is meant to be popped out, so dont sweat it. To put it back in, you literally just press it in with your fingers.
Easiest thing ever, I promise. Will spec out better than leather.