@grant, It is common practice in some commercial nurseries to use sand as a rooting medium.
And for what it's worth, I've had my cuttings in pots all winter long, through sleet, snow and hail. They still look viable. We'll see if they send shoots in spring.
The big thing to watch out for is that you don't leave em out when temps drop below 40ยบ or so, it will damage fresh growth and potentially kill your plant.
@persianninja, I use a soldering iron but I wear a protective mask and do the job outside so my house doesn't smell like burnt pvc.