The top of the box sits at 36". I could have gone a few inches higher without any trouble, but I'm happy with the three drawer setup. You can get those drawers in 1, 2, or 3" depths, but by the time you built a box to hold one of the drawers you'd probably be over 41". I think for me anyway that would be to high for long sessions, but it would be pretty handy if you prefer to stand at the bench.
The nice thing about that setup is that I can take the whole thing anywhere in the house, clamp it down and get to work. Everything I could need for case prep is right there...except the cases.