Go ahead and use any tank that is in the 7-11oz tank size. I use a 11oz tank and never fill it all the way since I don't like the change in CG as it empties. Also some good advise is to go smaller if your running one of the smaller engine sizes suggested. If your running a larger engine like some of the large 4-strokes (.63-.82), I think you could get away with a bit larger tank since the thrust provided by them is a good bit more. I am running the 11oz tank that came from a H9 twist I had a few years ago and it works fine. I think I will be going to a 7-8oz tank when I get around to buying one.

The only advise I have is to make sure you don't have slopy servos and that you have solid, slope free, control linkages.

Oh yeah, the wire gear is the litest gear around even though its steel and it is the most durable, and easily straightenable. Don't go out and but some snazzy CF or aluminum gear until you have tried it. The only bad thing about it is that it is rather narrow but that is sorta a gimmy since it would wobble if it wasn't.

I love mine.

Dave