(additional extra, to add a new dimention to table tray use).
 
These MDF hand made connection slides can be bought to add extra dimension to table tray tops.
Strong, hand made and sanded smooth.
Made from MDF (fsf sustainably sorced wood).
Available in two lengths:
Short connector, used to connect the middle height table to either the tallest or shortest table tops.
Long connector, used to connect tallest table to shortest table top.