Sugar Fab

EvilMadScientist's sugar fabber promoted quite a lot of discussion in our office today. Using sugar as a fabrication medium is inspired, but we wondered whether we could use something more accurate than a hot air gun to fuse the sugar. Using a high-power laser would seem ideal, but I think there's a lot of milage in using a lamp (or lightbulb) and a moving lens or mirror to focus heat on a particular area.