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I got a sheet of quarter inch thick clear polystyrene (they were out of Lexan) and cut two 7 by 5 inch sheets. I used 1/8 x 1 inch bolts, washers and nuts to make a sort of tight sandwich center point. I drilled through the twinlead center about an inch from the element ends. The bolts go through both sheets of plastic and the holes in the twinlead, really gave a very sturdy center point between the mechanical connection with the twinlead and the compression from the plastic sheeting. I also used two bolts on the bottom as electrical contact points and soldered the centers of either side of the array to bus wire connected to these. I used a 300 ohm to 75 balun and am using RG6 as the feed. I used the wife's hot glue gun to seal the plastic sandwich and further anchor everything.

(per chgomonitor 11/10/06 on the Antennas Forum - Thanks Ted!)