I just wanted to send a huge Thank You to Brakehawk. I built a zipline for my children for their birthday, but once they tried it once they were dreading the abrupt stop at the end. I tried a bungee brake and a coil spring brake on the line, but it was downright dangerous. Last month I purchased the Brakehawk braking system and wish I had bought it sooner. The kids, and adults, now enjoy the line as it was intended. Thanks again.