Deck screws worked for me. No glue. Just screws. Tablesaw, chopsaw, router and from below jigsaw built into it. On wheels and gets moved back and forth all the time. Still no play in it after 4 years. I don't really beat on it much with a hammer but I have on a couple projects.

Not the right way I'm sure. But an example of good enough to hold 2x4s together.