The height of the ballstud can be adjusted between 17 and 20mm with the 2 included inserts. This allows you to change the steering feeling on the car in small steps when it is required. The horn gets mounted with a standard screw from the front and with one small screw from the side to eliminate unwanted play in the steering unit!
There is also a servo horn with 23 teeth available for Servos from Sanwa, Power HD or Savöx for example (MR33-AAS23T)
We use the 18mm setting on our Awesomatix A800X MMCX!