Overview
This 8-piece Sledgehammer kit was produced in 2013, and was a one-off to take to drum shows, rather than a production item. Rumours have it that it was sold to a collector in Germany; should be easy to locate by the massive gravity well it would produce!!
The sizes are 8"x8", 10"x8", 12"x8, 14"x14", 16"x14", 14"x6.5" snare (the standard Sledgehammer) and 2 x 22"x20" kick drums.
As you can see from the video, it's officially a Black Panther kit, albeit a custom one-off.
The main photo is courtesy of Martin Potts from Korg UK. Cheers Martin - much appreciated.
The other is from a Mapex post. The kit isn't blue - it's just the lighting in that shot.
