A friend of mine bought this to my attention when we were both flying bebop 1, suppose to help Bebop 1 hover in place. Another trick was to twist the GPS cable harness running between board and GPS module.
Anthony made a video on these two applications, Bebop 1 has a Issue with not hovering in place, supposily painting the inside nose cone and twisting GPS cable harness helps.
Good luck, enjoy Bebop 1. I still have my Bebop 1, still flies but battery only last about 8 minutes.