Hi i am not sure of your table size, but depending on the size a simple fix would be to use a true flat surface the size of your table.
Sit this on the bed of the machine and put some adjusting/packing pieces under so the reference flat surface is adjusted to get it in the best position.
Then take out the packing pieces then using epoxy resin cover the bed ways and place a piece of paper between the resin and replace the flat surface replace packing in correct order then let the epoxy dry.
You need to know where all the fixing holes are before doing this.
A piece of ground stone counter top would be ideal but do not tell your partner.