Thank you. I think I am getting closer to a solution. While I love realtracks, short of owning the Audiophile edition, I think it may turn out to be an exercise in futility. Since in my own songs I intend to play many of the parts myself (to various degrees of ability and digital cheating), they are not absolutely necessary.

In fact, I was looking at updating my BIAB collection, but I'll leave that for a separate thread.