Extreme Flight 50cc Extra 300 all the way! You'll love it! The covering is fantastic, and it's Ultracote. It has a cannister/pipe tunnel built in.
The plane is awesome for 3D, and it flies so precisely that it'll almost make you fly straight! :-) It is one sweet plane!
Here's a video of mine:
http://www.flyinggiants.com/gallery/...ser=18976&sl=d
IMO, you won't find a better 50cc airplane! I have ***0*** complaints about it, and can't get enough of it!