buddy backrest

I have been wanting to figure out a way to fashion some sort of backrest for the buddy, as you will come to find out my fabrication skills are lacking so I did what I could to improvise the following...
I tried to match the color of the seat but if you see it doesn't quite make it.

You can't see it in this picture but the base of the backrest is an "ammo can" from the army surplus store bolted to the rear rack via conduit hangers.

I wanted something I could adjust, this one has copper tubing that slides in the conduit hangers that I bolted to the top of the ammo can. here's a pic of a conduit hanger if you don't know what I'm talking about (http://images.orgill.com/200x200/1731256.jpg) .

The pad also tilts to fit the back a little better.

One big problem with any of my designs was that access to under seat storage was blocked. On this box when you open the lid you can get to your underseat storage.

If it's got any flaws so far 1) it's fairly heavy but really not as heavy as I thought it was going to be (it gonna get heavier when I make a rack to hold a gas can behind the ammo can)

2) some minor adjustments need to be made like lowering the back pad slightly, and when i figure out where I like it I'll more than likely cut off more copper tubing to make the rails a bit shorter.