Subbed and following.
How about having both servos fitted inside the boom fuse like the FT Mini Cruiser.
View attachment 35656
Like that but in the boom and then the push rods will come out of the sides of the booms making for a much cleaner look.
I guess for those that can afford to put a better receiver and 5 servos in that's fine because four of those are on y harnesses anyway. Plus some people want a rudder and some could bank and yank. So I guess Nic that you just need to have the space for a more advanced person to put 5 servos and the capabilities for a more of a novice to only have 3 (No rudder but they might have differential).
Safe Flying.