We built a new table using 2 pedestals. I tried one pedestal, but it was not as sturdy as we needed. I cut a piece of 3/4" plywood as a base.  It fit tightly between the 2 hassocks and the wall.  We used some of the non-slip rubber matting under the plywood.  the pedestal bases were screwed into the plywood with #12 x 1" wood screws.  It is very stable.  the table top comes off and is stored on the seat and the 2 pedestals travel on the bed.

Hope this helps

travel safe

Vann

So the white piece attaches to the wood under the cushion ?  And what looks like  the end of the bar on the left side of the picture ?

Thanks for sharing - you should have been a furniture builder !!  Couple of questions:  What is the U-shaped white piece at the rear of the table and on the left side of the picture it looks like something attached to the outside of your slide piece at the front ??

I also swapped out the heavy particle board table for a Lifetime 24" x24" folding table with short legs.  Not only did it eliminate weight aft of the axel, it doubled as a coffee table that we used outside.  I put a small round piece of plywood on the bottom of the table attached with a bunch of little screws to provide a stronger base for attaching the upper table base disc.  When we needed the extra sleeping space in the dinette, I put the old table base on the floor of the bed of our truck to take along.

Would like to replace the fold up removable table on our 2019  189 (rear couch) with a standard base mount and pole.  Can I screw the base mount into the floor or should I consider some other way of attachment ?  I have no idea how thick the floor is in this model.