YS110
The CGM Ultimate taught me huge amounts about 3D and demonstration flying with a YS120NC up front. Unfortunately, it took putting the battery in the tail plus about 50grams of weight back there to balance her out nicely.
Now, the YS110 turns about the same of what the NC turns at about 5 ounces lighter. I cannot think of a better combination for this airplane. Cheaper, yes. Better, no.
Mark