I'm still not quite clear on whether buying a single instrument download is a sensible way to incrementally buy the Extended license for a DVD Collection, or is meant strictly as a way of starting from scratch and/or from Special Edition.
Main point: do you HAVE to download and install the single instrument download, or does buying it "enable" the specific articulations in your already-installed DVD Collection?
The hassle factor and redundant disc space waste have put me off from buying a Single Instrument download so far.
But with the dollar briefly in a more favourable position to the euro (and this could change as soon as Monday!), it seems a good time to consider incrementally improving the available articulations for some instruments (especially if just a few from separate libraries), vs. saving up strictly for the whole-hog Extended licenses.
I suppose the overall "wasted" disc space isn't terribly significant overall (though the doanload time and direct attention is), but of course there's also the issue of potentially maxing out one's Syncrosoft license key, by participating in the individual instrument purchases/downloads.