Being a metalworker I made my own interchangeable mount years before they were commercially available. As for a sturdy bench I am using a Baker's table that I purchased from the unfinished furniture store. It has a thick laminated maple top, 4" x 4" legs and a couple of movable shelves. Cost was far less than what I would have been able to build it for. I have a couple more presses mounted on a microwave cart I purchased from a big box home center. This also has a substantial laminated top, sturdy legs, storage drawer and shelf. It also has lockable casters so I can move it into position for use or push it into the corner. I have extra plates for my mount to mount other accessories but so far I just clamp them where needed with a small quick acting bar clamp.
