Hi Ralph,
I actually picked up a copy of your recommended book below for reference, and I still have it
We've had to shift the priorities a bit (as you can imagine) with the passing of Mark Walsen and then the transition to Reinhold Hoffmann. Supporting a standardized drumset notation is still on the "to do" list, and your idea of "equating" actually fits in quite well with the idea. From what I can see (and what drum folks tell me), the actual instrument on any given line can be different, and they don't really care as long as someone tells them up front which space/line is what instrument.
Please do let us know of any further recommendations for a drum notation feature. We can't promise a time line for it at this point, but I can say that we do listen and try to implement features to fit our users
ttfn,
Sherry