One more thing from last night that was a bit too boring to put into the main exposition: I upgraded the CF card to a faster one. The secret here is that if you have a suitably fast CF card then static machines can be used in most places and you can use the onboard memory. Since onboard memory is small (84mb) this can be nice. It's probably OK to wait until you actually run into the problem unless you've already got fast CF cards around, but I'll talk about it here anyway.
CF cards are, as a standard, maxed out. There will be no faster ones made. Further, Octatrack is limited in the size of card it can process. This could be read as a problem, but it makes it easy to figure out how to get the best performance out of an Octatrack: any 64gb 160 mb/s (or, equivalently, 1066x) card will achieve top performance for an Octatrack for all time.