Hi crhammond (& others if able to respond),

If you used the phenolic horn that came with the kit what size servo arm did you use? The distance between the rudder horn attachment points is about 55mm and the biggest horn that comes with the BLS451 that I bought for rudder control is much narrower than this. Did you use a different servo horn to that supplied with the BLS servo?
Can you advise the best size servo arm to get the required travel on rudder?

All the best, Simon

PS. When I read your post I realised that I bought the wrong BLS servo for the job BLS451 rather than the BLS351, I'm now kicking myself!!! Hopefully it will do the job ok.