I doubled the size of my safe using Rifle Rods. You can stack a lot more guns in the same size safe. They also make it easier to get to the guns in the back. You need to unstack less guns to get to the back.

http://www.storemoreguns.com/rifle-rods-3.html

Look at the pictures to see how they work. They show a dealer in Denver.

I also use the socks to protect the fancy guns I have.

I also advocate getting the biggest safe that will fit your circumstances.

Happy Hunting.