These are the limiter discs published by FliteTest.
I take no credit for the idea behind the concept, just wanted to make a 3D printable version for those who want to help others get into the hobby
Base Limiter Disc (Dia.: 44.25mm)
Taranis X9D (Dia.: 44.50mm)
Turnigy 9X (Dia.: 47.80mm)
If you would like limiter disc to fit your transmitter and know the inside gimbal diameter, I will upload a new version for you.