I have been using 4x6's 4x8's or 6x6's for years to mount my presses to the bench I find I can usually get them for free at building sites or lumber outlets as they just want to get rid of them anyways due to not being able to sell short pieces. As you can see from the attached pictures I use bolts that go all the way through the bench ,wood and press to provide a very solid mount, I also put one further back to stabilize it even more. I also put a white piece of laminated shelving available at any home supply store and cut to length which is 2 inches wider than the 4x6 using as it form a nice shelf to mount case gauges on for quick use.. I j
Fred Honeyager