Mine will be in for the 25th but I'm fine with an extension if people want it.
I've always regarded Sisyphus stories as works in progress - written and polished to the best of my ability for the swap, but that's not to say I can't keep working on the story and eventually submit it somewhere. Four out of eight of my winter Sisyphus stories have been sold.
The ultimate example was my first ever Sisyphus story, "Mourning Becomes Me", which ran 9300 words for the swap in 2013 but which I rewrote from scratch the following year (including material from another story, "Spinning Fast", which I'd written later in 2013) and it ended up as a novella of 34,500 words, with "Spinning Fast" effectively a 4000-word prologue, the two stories the final two in my collection from 2015.