I don't know about the weighted hub, I put an OS engine in my (Alpha 60) and it didn't have one. All you have to do is get a spinner for a 2 blade prop and a 2 blade prop. I have run a 12-6 Master Air Screw and it flies very well, much faster, but it flies fine. I still run the 3 blade trainer prop because it really slows the plane down. I have also run the aluminum screw on spinner nut. Just doesn't look the same but flys just as good.

happy flying with a great plane!!!