I have a new to me .4 and I was trying to install a hitec servo (HS-7954SH) in it but didn't have a Tekno brand 24t servo horn. They seem to be out of stock in most common places online.
I bought an aluminum horn that was available locally. Since the Tekno ones mount "upside-down" I had to file away part of the horn that was protruding to make clearance for the screw head between the horn and the servo case. I never got it really on there tight enough and it stripped after the first few laps. In the end I think it was more not getting those 2 little screws tight enough but it was a some what frustrating experience with something that should have been "easy".
I was thinking of getting a flatter horn that would hopefully provide more space under the the horn and the case. I was looking at these 2 :
https://www.amainhobbies.com/hitec-m...hrc55701/p5356
https://www.amainhobbies.com/protek-...k-7807/p232620
Neither have those screws, but rather just fit on. Any thoughts, Thanks!