Jim,
I opted for a no-tilt till for my most used bench planes because it takes up less space in my small shop. Garrett Hack's till convinced me I didn't need to tilt it. Mine hangs flat against the wall on a French cleat. It has toe and heel clips to keep the planes secure. I've had no trouble with it in the several years it's been hanging in my shop. My concrete shop floor is always a worry, but I don't know that a different till design would reduce the risk. The only thing I would do differently would be to build it with some extra spaces. I now have a couple of "homeless" 4 1/2s I acquired after I built the till. Here are two photos - one with the till on my bench and the other shows the till hanging on the wall.
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Hank