OK, thanks. I'll have to talk to Grant about that. If the angles of the Mercian are significantly changed to accomodate an EBB, I may take the other option, actually, to keep myself from running up the tab on this. As it is, I'm still on an "affordable custom" basis with this machine, and I know that changing the standard angles on a Mercian costs a bit extra. Again, thanks.
***By the way, I also prefer the Mussorgsky 'Pictures' for piano, although Ravel orchestrated it because he felt it to be "unpianistic," which is also what led Horowitz to change certain passages in his magnificent but somewhat notorious version. I think Richter's 1955 Sofia performance is probably my favorite, though.