Came up with a solution--I looked at several of your suggestions but ultimately figured out that using my large, deep plastic totes, along with a plastic tote the same size but 1/2 the depth, allows me to put 2 layers of cones in each tub, sorted by colors and easy to actually see what I have. I then slide the totes under the long arm and can put my feed up on them when I'm quilting while sitting on my drafting stool! Win/win!