I have the Century Piezo gyro for my Bell 222. I haven't used it yet because I've been practicing on my Hawk Sport this summer, now its time to get back to building/painting my Bell 222. Anyway, in my Hawk sport I have the GY 401 with digital servo combo and it works just fine. Most everyone in this forum will recommend that combo. Fairly easy to set up & works great. I only hope my Century Piezo, will be as easy to set up & work as good. Hopefully someone with that type will let you/us know how it works. In any case the GY 401 is a good sturdy gyro.
Joe