I was flying a Fantasy, which is now marketed by Skyshark RC. It has a certain amount of power with the TT Pro and 46 FX. My logbook says that I had around 40 flights with the FX and APC 11x6. A couple of us had flown it with both engines. The first flight with the 46 NT with same 11x6 gave the Fantasy a lot more power. The first takeoff was a big surprise...and the engine was needing more break in time to smooth out the low end. It had more power from the start and got better with each tank of fuel. Well, the Fantasy elevator fluttered again and didn't survive this crash, so the 46 NT is going on a Somethin Extra that I'm in the middle of repairing now.