DG, I would comment about the very ancient, and long since non-viable GOS strings library that did allow for setting one's own bow changes. With it being available in that very old, outdated library, one would think that just maybe...
But, I won't go there. <smile>
As others have commented, I too would really like to know how long the advance purchase period will last, as it will likely be a couple months before I could make that purchase, and DS looks like it would be very helpful.