Unless you are just set on the idea of a rod holder in the rod box, you can get rod sleeves for each of your rods. Ive been doing that for years and have 12 rod/reel combos in one rod box. I can reach in and pull out any single rod without them getting tangled. Ive been using these for 15 years and back then, my wife made them for me. Now the one call a Stick Jacket is very popular. Just a thought.