Just a heads up, the black Maths is unobtanium at sane prices. I'd recommend looking at the standard silver panel if you are dead set on Maths.
-- farkasOr look into a nice, black replacement panel.
-- ambientvalent
Maths with a black panel is 100% the same all-but-rare module everybody has ever owned... IMO these prices are ridiculously laughable. Buy Maths used, some utilities (attenuvert/offset) and a good mixer for this case. Thank me later ;-)