ORIGINAL: ameyam
I will setup the servos on 1st and 8th (I think) channel to turn in the same direction, then mechanically oppose them. i.e. on one side the pushrod z-bend will be in the servo horn hole on the top side and on the other it will be on the bottom side. I will either use the 6-armed horn or aluminium horns from GP similar to the one I need to use on the Reactor Bipe. Since I will use the ''1'' numbered arm on both sides, the servos will move in sync. I will do the same with the ailerons
Ameyam
I would not mechanically oppose them that way...
The elevator servos need to move in OPPOSITE directions to each other for both elevator halves to move in the same direction.
The aileron has no such requirement so you could opt to hook them both up to a "Y" cable and run them off one channel.
With the elevators you reallyl need to use one of the techniques I mentioned above.
IMHO the WORST choices are to put each servo on a separate channel or to use a cheap servo syncronizer cable.
The elevators end up with a lot of travel for 3D, and the delay becomes very visible at stick extremes. Mechanical opposition is still better than both of these options.
As Ahicks mentioned standard servos fit just fine.
Z Bends work fine, if you set them up as per the instructions and use "keepers".
I went with the provided horns and ball links for the elevators. I've well over 200 flights on my Funtana and they have held up well.
Re: Strengthen...
Landing gear attachment area.
Tri stock EVERYWHERE you can.
Remember the idea is NOT just to put a piece of triangle stock along the mount, but rather to SPREAD OUT any torsional loads.
As you tackle this, don't think to yourself... "where can I glue in some tri-stock", but instead, if the gear pushes forward, "where is the load applied and what can I do to prevent twisting?"
Longer adjacent cross members are far more effective than gluing on some tri-stock on each side of the gear mount board.