It is the single. He is using a stumax in it. Thats why I am so blown away with this one. If it was the big one they all look good but the little one with this kinda detail is crazy.
Here is the thread. Not really a build thread since he got it as an arf. But does have more info on how he got it.
http://www.rcgroups.com/forums/showt...ght=yellow+f18