I've had two seperate occasions where my experience with a particular engine did not match up with what others were saying. The first was with an ultra stick where some guy said it had unlimited verticle with a TT46 pro. The second was with a pacific aeromodelers edge 540. This guy said he could maintain a hover with a .46 fx. (6lb plane)
Just so I am clear, I want to explain what my definitions are of the the words hover and unlimited verticle.
If I am wrong in my understanding of these words, please correct me.
1. Unlimited verticle - Person holds the plane by the tail and the plane will climb from a dead stop. (Not a buzz the runway at 80mph and pull up and watch it go)

2. Hover - The plane is oriented in a verticle position (not sorta verticle like a harrier) and the engine will maintain it's altitude.