Stable tables

Hello just looking for tips on where to buy or make a shake free table 6 ft by 4 ft machine runs great but table jerks around when it runs thanks for help.

Research torsion box, strong and dead flat…

Then add knee braces to the legs in all directions.

Added weight also help.

Thank you all for your messages i will be making my own thanks for all of the help

Interested to see the finished product…