Dave, when I first dealt with RFC, I thought their service was outstanding but didn't know if it was just with me. But every time I send someone to them, I hear the same good report. I presume you ordered your 400 with connectors and if you'll give them a real close inspection, you'll see they are just perfectly constructed. Glad you can see the signal improvement. I always mention impedance mismatches and keep hearing from people that it's not that important when you're just receiving and not transmitting. Yours is a perfect example of why mismatched impedance does matter. Anyway, I'm glad to hear you've had a good experience with them.