The post office was kind enough to be a couple days ahead of schedule! Instead of getting the string on Tuesday (the estimated delivery day), I got it this afternoon.
One more thing on the docket, though. I forgot to put a serving jig in the order. This won't be a problem, as my last serving jig was one I made up myself. It worked fairly well, too, so I think I'll take pictures of that coming together... Not that a serving jig needs a build along, but since I still have scrap parts laying around to whip another one together, might as well show it!
I was also planning on doing a good chunk of work to the handle tomorrow, so the hope is to get the handle and string taken care of tomorrow, spend Monday getting the bow shot in (I have the day off, so that shouldn't be a problem), double check the tiller, then finish the bow.