I believe I saw this idea a long time a go relative to power tools. A simple description- You mount each press on a square piece of wood. Maybe have holes drilled in the sides or corners of each piece. Then have studs or inserts in the top of the bench to match the holes. Put one press on the bench and bolt it down, then use it. Unbolt it to switch to a different press. All of them could be unbolted and stored hanging on the wall, setting on a shelf, or in a cabinet under the bench.

I used a workmate with each press, even a Dillon, bolted to changeable tops. It worked well.

I had large steel plates made for each of my presses and I C clamp the one I need to use down on my reloading table. a few extra threaded holes and I can clamp my RCBS priming tool right next to one of the presses as well. There are felt pads under each steel plate to protect the wood top of the table since I made it to be a furniture type table with hardwood maple top.

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http://www.patmarlins.com

I bought some of the rock docks from pat marlin and they are very nice. Easy to use and swap from rock chucker to lube sizer to whatever else you want.