Holding a nut in place inside tubing - GIF

[Beserkleyboy]

That'll work, too. Many a small saw have been 'inserted' into a bigger table. Consider making a full height box base, so it looks like a cabinet saw (think UniSaw). The more you bulk it up, the more it'll work like its bigger cousins. Where are you located? Our 'big box' store, Bunnings, keeps a decent range for that type of saw. Maybe Home Depot or Lowes.
Jim