Construction:
3/4" plywood with a 3/4" aluminum cap to keep from getting splinters.
The rollers are about 1" woodworking ball bearings that are used to move
wood along when cutting etc. They were put in from the inside with
heavy screws and I can stand inside and it will still roll. I only
used four, one on each corner. The locks consist of dead bolts bought
at a yard sale because they had no locks. Since I was not interested
in their locking, I put them in with the knobs on the outside of the drawer,
allowing the two to keep the drawer in place.
I raised the dinette by 4 inches using 4/4 wood. i.e.. that is wood
that is really 2"X4" not 1 1/2"X3" as in regular 2/4s. That allowed
me to use the bolt holes to connect the drawer to the base I built.
Then
I installed some heavy duty hardware, in my case 140# load bearing full
tension guides, and make a drawer that fit snugly under the dinette. I
did cut off the metal brace on the back of the dinette but inserted 2"
angle iron brackets on the sides of the dinette to fasten it to the floor.
Used
simple locks to lock the drawer when shut, and put in a divider so things
wouldn't roll around while traveling. Drawer works great, and the
opening on the inside of the dinette still allows one to get to the inside
to install the bolts to the floor and to use the little pockets on the
sides for hiding other important stuff.