A challenge

The lovely C left this comment yesterday:

C x said...
I'll make you a deal. If you finish the legendary Aran Chair Cover before Christmas, I will send you a nice knitty Christmas pressie. There you go. Motivation.
1:08 PM

I am *fairly* sure (well, a bit sure) that I can meet this challenge but it does pose another challenge of its own - how can I repay this thoughtful act of kindness?
It is deeply sad that I need a carrot dangled in front of me in order to finish a project that I was so enthusiastic about at first and it is even more sad that I cannot think of a fitting way to repay C. I know she works in a yarn store so it is very unlikely that I have (or could get) any yarn or knitty bits and pieces that she doesn't already have. Hmmmmmm............................ thinks............. may have a little idea.................................... *scuttles off to look in deepest recesses of sewing boxes*
C, if you read this, give us a clue!