Arlin requested detail info on my clamping jig I used on several cutting boards. So here it is. The base is made from MDF that is glued together and the top sheet is covered with heavy duty packing tape (don't use the cheep stuff). The two runners on each end is maple and is held on place with 1/4" bolts & "T" nuts that are relieved into the bottom MDF sheet and bolts sized to not protrude below the bottom surface. The rest is shown in the pictures (see the dimensions in the pics). If you have questions I'll be happy to share.
A picture is worth a thousand words: