If you already have the servos, I could see just throwing those in there to start (thats what I did). But, I have a os. 46 fx in there now, and have already stripped a servo, and now one has developed a twitch in just a month and a half.

I would recommend getting at least 70oz/in servos if your buying new, since this will give you a little insurance power in case you upgrade engines. As I am sure you have seen, these are some pretty large surfaces (which is great for 3D!!!), but can certainly put some stress on your servos. Just my thought and I hope this helps

Tyler