I practice 3D with the AJ Slick 51". I think it's on the expansion pack 5 or 6. You could also go to knifeedge.com and download practically any airplane in existence.

Remember that it's excessively easy to 3D on a simulator. I can hover, torque roll, and harrier inverted and up right all day long on the Sim. I can even get a rolling harrier down. But I can't even come close to do that in real life. So it's really just good muscle memory practice for your thumbs/fingers.