I've been slowly, steadily converting all my helicopters over to Crossfire. I love how small and easy Crossfire Nano Receivers are to work with, they work great with my TBS Tango 2 transmitter, and the control link range is incredible! After being out of stock everywhere, ProgressiveRC was the first to notify me that a new batch had arrived. I immediately purchased three receivers, just to have them on hand. And, as always, ProgressiveRC offers great service and super fast shipping!!!