I am building my first kit. It is a Goldberg Cub and I would like to have 2 aileron servos instead of 1. My question is has anyone done this and are there any instructions on how to do it.
Thanks John

John its been done many times pretty easy really
several different ways to go about it if you want to hide the servo with just a horn sticking out for the pushrod install 2 mounting rails in the wing at the servo location for the plate to screw to,then make a plywood plate for the servo mount between the ribs,using some small blocks glued to the back of the ply plate will work for the servo mounting screws, its typical ARF style.
if you dont mind the servo exposed, and have enough space in the wing for the servo to be mounted upright, then some basswood or similar, mounting rails placed from rib to rib with the proper spacing for the servo is also fine, you will need to frame in the area with some balsa,just some 1/4x1/4 pieces so you can cover the wing to the servo mount its pretty simple.

here is a typical servo mounting on a ply plate from a model I have for reference

John,

Congrats on deciding to build a kit, you will certainly learn a lot. Just be careful to follow the plans closely being particular in making everything straight and square. You'll will then have a great flying airplane.

Now to your question.

Yes, you can have a servo for each aileron without too much an issue. What it involves is having a mounting plate for each servo in the respective wing. The servo can be mounted to where it has the servo arm in parallel to the wing surface or vertical where the servo is mounted internally within the wing. Either way works well, the servo being internal is more eye pleasing IMO; I have birds with each type of installation. Servo extensions will most likely required with pathways cut for the wiring to reach the fuselage through the ribs. Be sure to safety the plug-in junctions or solder servo extensions so they will not disconnect from vibration or jarring. Once installed the rest of the procedure involves programming your radio for dual aileron function. Aileron differential is certainly something to be considered on a Cub. Hopefully you are a member of a club where a more experienced member can give you some additional guidance.

Welcome aboard to building a great part of the hobby!!!

I just finished one for a friend and did it like Big. It's pretty much the normal way to do it. Just don't forget to drill holes through the ribs and install a rolled paper tube through the wing for the servo wires. Something I tend to have forgotten more then once. The CG kit is an old design and built like a tank, also one of the better flying Cubs you can build.

Thanks for the help. I do have a couple guys that have alot of builds under their belts that I can ask too.

Dude I have built something like 6-8 models over s few years.  My advice is for a first time build to just follow the kit instructions until you have some building techniqes down.  As previously stated it really is not that hard to do what your are asking.  But I just believe your concentration should be on building like it was designed first and understanding how and why a thing was done a certain way before you deviate  from the plan.  Whatever you decide to do, welcome to the building club.

The change is simple, he has knowledgable help available and the reason for the original design was driven more by the cost and weight of servos when the kit was designed. A servo on each aileron is simple and adds redundancy. Just because the plans don't show it being done, and this is a first build should not automatically mean it is a bad idea. I say go for it, you won't be sorry.