My Morris Hobbies Sledge with a West 50 and Genesis Throttle pipe running a APC 13x4 W would do both upright and inverted climbing flat spins. It was the only 3D model I have had that I could flip it from an upright to an inverted climbing spin and back. Quite a party piece.

My OMP Yak the 65 with a OS 120 AX would do both but not the flip between at least I could not get it right.

If you are exploring 3D I would recommend a profile. http://www.swanyshouse.com/primo60/primo60.aspx this one is about as state of the art as it gets.