I clamped long pieces of extruded aluminum t-slot framing material to the front and back of the tabletop and then clamped the wings to those. Worked very nicely.Thinking about assembly... The wings are not exactly featherweight. I needed help with the wing install because getting them really coplanar required a bunch of loosening - adjusting - tightening - checking -loosening - adjusting - tightening - checking - loosening - adjusting - tightening - checking.