Summary I used #12 household electric wire. You need eight @ 419.1 mm. & two about 292.1 mm.See photo for more info. Bend the 419.1 mm. in half with about a 76.2 mm. spread on the ends and the 292.1 mm. bend to fit tracks avoiding the two shorting one another out. I did this by creating a small hill in the one set. Again see photos. All most for got the 300-75 ohms transformer you need to connect this to your TV. You would connect at the center point. Created with Design Spark Mechanical. http://www.rs-online.com/designspark/electronics/eng/page/mechanical Have a great day! :-) Robert KB3LNN