For regular flying with the Magnum 61 you use a 12-6 prop but for hoovering on the Magic, I would try the APC 13-4 fun fly prop? You would like to try to run it just above 10,000 rpm static. If you use 10% nitrro the13-4 would be the limeit. But If you increased the nitro to 2%, you might could run a 14-4? The plane is only going to fly 40mph at most which is OK on the Magic.

Enjoy,

Jim