Nice woods! 
Here's a page with some Alembic shapes: [Invalid or Expired Link Removed] and the one I posted above can also easily be adapted for 3+3 I guess
This brings up a good point, though. I'm hoping we can find some design that will enable 3+3.
Here's a page with some Alembic shapes: [Invalid or Expired Link Removed] and the one I posted above can also easily be adapted for 3+3 I guess