Well, the clips of the real 8 string bass in the OP of that thread does sound quite synthy compared to the ones I've heard, but yeah you nail that sound pretty closely with the Mosaic.   I am going for something sounding more like this though :   And I think I am able to approximate that pretty closely with my Sub'N'Up. I'll record some clips when I get myself pulled together to do so, might take a few days though before I get it done.   Act