As I recall they are 26' long thus would be about half the length of a windcutter. Therefore it would be tough to form a proper d-loop.
I would suspect the best use would be to cut the head off and cut the head in half. Loop both all three cut edges. Then put a piece of 11 or 12 wt belly in between the two until the grains match up. That should give you a nice winter line with:
1) 13' fine taper for smaller flies and better turnover
2) 13' dredger tip
Besides the Teeny running line is nice and the middle section would allow you to adapt the system to more than one winter rod.
Nice color change at the back of the head too, and you could use the tips interchangably with other tips in your wallet.
Don't quote me on the 13', that's just half of the 26' teeny head.