So it's a no. Not enough yarn.
I ripped back a full 10-row repeat and was able to finish the edging, with not a heck of a lot left over. Others have said this before, but I continue to be surprised by how much yarn those last few rows use up...
Object is now finished, and I can move on.
(You want pics? Sorry, no, it's destined for somewhere else... you'll get to see them eventually, just not here.)
What now? I have three balls for swatching for design ideas... Needful's fluffy and rather sweet Joy, Noro's swoonworthy Cash Iroha (silk and cashmere and wool... ) and Rowan's oddly enchanting and not overdone Romance.
I'll let you know what I think of the yarns as I work with them.