Hmmmm good idea. I too wanted to increase the size of our little dinette so we could play cards with 4 people in our 13' boler
, on rainy nights, without tearing the bed apart.
I took a piece of thick plexiglass, cut the same size as the dinette table, and hinged it to the table top at the back with two small holes drilled in the other end corners, making a nice protective top for the table. If we want to extend the table, we swing it around (It is on a pedestal only), flip out the plexi doubling the table size, slip two extendable poles into the holes to support the extention and viola. It leaves enough room at the bed end for two small folding stools to make seating for four. Works well, but I like this idea too.