Just took a second look at your bridge. I have storage problems in mine for the small stuff. I like to use an mp3 player and have problems cause it wont stay anywhere and in the ridgeline bag the cord is hanging. I see a lot of potential in the little triangles you have hanging off the ends below your suspension attachment points as being pockets for stuff like a flash light, socks, beanie cap, or mp3 player.

Just more food for thought.

Edit:
Ha ha just took a third look at your rig. What kind of hardware you using on the suspension triangle. weigh it then compare it to the dutch donut and see if dutchware isn't lighter and cheaper. I use the donut on all the bridges I have made and find it to work great.