Peter

the tail is now modified to just take 20mm thick servos. So your choice. Bizarrely the lower cost MacGregor servos come with good quality nylon arms, the 28, 37 and 55kg don’t!
Savox arms nylon and metal are junk…but 25tooth std spline gives you the choice.

I have the JP gear and I’m still happy with it after approaching 50 flights. If you depend on braking then the Electron controller/brakes are the best. I land slow enough not to worry about brakes! Grass there is no difference really so either.