I did this one just playing around, with the head mentioned above. Didn't even try to level anything, stitched in Elements 9. Some distortion but that is to be expected in these close quarters, with 3 shots covering better than 180 deg.
Cameras: Canon G12, and A1200. Sony DSC-H90. Fuji HS35EXR.
"A true photograph need not be explained, nor can it be contained in words".