the colourwork-in-the-round solution works! there was a trick to sort
out (and a resulting gap to sew up, whoops), but i've done it. now, the
question is whether i can write it up in a way that makes sense to
anyone other than myself. i guess i should google first and see who else
has done it already, there is no way i am the magellan on this one
surely. still, i feel quite clever today!