I fly IMAC and 3D. THey do very different things fo rthe soul. IMAC is grace, refined skills to glide thru the air. 3D is sort of like flying a heli. You are trying to beat out the laws of nature. It is more pulling and wrenching the plane about to get it to do what it doesn't naturally want to do. But then, 3D can be very graceful too. It is just a bit closer to the razor's edge.
You can also find some basic info on 3D on my website.
www.fly3drc.com
If you want to see some of the limits being pushed well past the envelope come to Mobile, AL this weekend. WE will have plenty to see at our 3D fly-in.