RE: Jamara Spitfire60 ARTF(+ retracts)!
Bill,
haven't checked this thread for a while....
Firstly, I haven't had any trouble with the elevator using the single supplied horn on one side and my Spit gets a lot of work. I reckon I have about 30 hours flight time on it in the last year (~150 flights).
As far as the exits go, place the horns where you reckon they should go and take a line from the servo arm to find the likely exit point and drill and angled hole along the line at that point. There is a bit of guess work but mine works ok.
The main issue with this model is that the covering does bubble in the heat (maybe less of an issue in NZ) and it is difficult to remove the creases although I have had success putting pinholes through to let the air out.
Have fun, it's a great flier!