I am having problems defining my 3D sketch (which I generally don't have a problem with). I need the overall outside rail dimensions to drive the inside dimensions of the bin. No matter what relation I put on it, it will overdefine it even though I can drag it to where it needs to be (from the upper 1/4" construction line only). I also can't put a dimension on it. I am almost out of ideas. Any suggestions are greatly appreciated!

-Robert Lankford