On an older project I had a Table Saw and a Router Table on a shelf unit that I put wheels on to move around in my workshop.

I needed more bench space so I picked up a Pine Timber Panel and some Brackets.

The bracket are just screwed on to the panel so the hold it tight on
to the sides of of the router and saw, so it can't slide around.
Now I have a nice size bench to work on, and it just lifts off when I need to use the saw or the router.