Really nice design, but it does not work on a Flysky GT3C. The Flysky GT3B has a larger diameter steering wheel as the GT3C. However, I found out you can make it work on a Flysky GT3C. If you change the standard GT3C steering wheel foam for a Traxxas #2224 foam. The Traxxas one has a thicker outer diameter and with this the OHD works like a charm on a GT3C! Might also work on other transmitters.