I had never heard of Achilles Wheel before this post so started looking around to give them a listen and liked what I heard. I found some videos of them where the bass player is playing an Alembic.
I haven't seen one yet where he isn't (his name is Shelby Snow). He has 2 (Rogues, IIRC); a 5 and a 6.
And he plays them like a monster! If you ask, it's perfectly reasonable to say "Phil Lesh, Jack Casady, David Freiberg, Berry Oakley, Shelby Snow, Bridget Kearney, Bryn Davies, Jimmy Johnson, Dave Torbert...."
Peter