I have a small bench that I use for various projects. I recently got a Porter Cable Dovetail Jig that I would like to mount to it. The top is 3/4 hardboard. I would like to be able to move the jig when not using it and have the surface of the bench still be flat. Is there some type of bolt that could be attached to the bench top that would be flat on the surface and remain securly in place so I could bolt the jig on when needed but remove it when not in use?