Originally Posted by
w_dupree
Is it that the horn needs to be tall, sit off the servo more than others, Like the HPI Ve8 horns or do they need to be pretty flush?
Not really, there is just a real narrow pathway for it to move in. The servo arm could be a little shorter and work, but the stock one is max height.
If you use a plastic one, be sure to use a small steel washer bigger than the intention in the plastic. It helps to keep it secure by pressing on the outside of the servo arm.