My friend patented an Acoustic Drum Expansion and is trying to mass produce it

kickstarter.com

4 points_Marak_2 comments

I can't imagine what a good death metal drummer can do with this Drum Expansion. Looks fun to play :-)

I got to play with a few different versions of it.

It's super fun to play. Was able to get some fairly complex rhythms going and I'm pretty terrible at the drums.