3U's comments are correct. I concatenated all the practice and contest days at the Nationals to get 11000 points. So, a large sample at an event with lots of flarms is important. BTW, my flarm antenna is the rear most one on the panel at the highest point in the cockpit. Antennas are the stock dipole that came with the core PF with a 4-5ft length of coax. At one point recently, I considered shortening the cable by resoldering, but decided that my performance was "good enough" and tampering with things seemed inadvisable. How much better would the performance have been by shortening the coax to 2 ft (I need extra length so the canopy cover can easily be removed)?