Spent some time last week and machined up a simple set of racks for the sled. Used black delrin/acetal wich is a nice machining plastic. We will have to see how it holds up to cold weather. Tried to make it as simple and smooth as possible, so things would not get hung up on it. I also wanted to use existing holes in the sled, I hate adding holes! Here are some pics of what I made. Board is farther toward the front than it would normally be as the wall was in the way!