Remember, the Bi Polar car body sits very high off the rails and the pan will be depressed. The height I threw out was the result of many hours/days of experimenting. Some pans look great and others like the Bi Polar have a compressed pan. On ALL MTH pans, the pan springs must be replaced with stronger springs to hold the contact shoe on the wire. Using sectional catenary if you see any spark you must correct it. Sparks on sectional catenary are a result of a bad joint or not enough pressure on the wire with the pan. Yes, sparks look cool but you do not want them with sectional catenary. I ran a new Lionel GG-1 under my wire and that sparking looked very cool. I am currently working on how to get that effect on pans other than Lionel.
