What nonsense for Mylaps to make a new transponder that is not backwards compatible with the "old" decoder. Maybe its greed more than nonsense. I was at larger race where the track did not have the new decoder and some racers showed up with the new new Mylaps transponder. All I kept hearing was the race anouncer say, "If you have a four wire Mylaps transponder, it won't work on this track. Remember to pick up a house transponder." Rediculous.