I'll have to experiment this afternoon, but I think that flipping the blade doesn't change the angle of attack, it changes the leading edge. If you just reverse polarity the trailing edge will become the leading edge, that's why you would also have to flip the blade. The push-on prop is GWS.

In all honesty, I flipped my motor to the other side 'cause that's what everybody else was doing when they used the actual GWS mount. It worked, I was satisfied. So now I'll do the scientific research to see if my theories are correct.

Just a note to you newbies. Check out Radd's school of Rotary Flight. It might help you out, if you can discipline yourself to follow the instructions. I personally didn't learn this way, but wish I had come across something like this when I was starting out. Even if you don't follow him to the letter you will learn a lot.

http://www.dream-models.com/eco/flying-index.html