Hi Mike,

You're correct in that the build chamber isn't currently heated. I'm reserving that as an option for later on, but so far I've managed without it.

It turns out that the heated chamber is useful, but not quite as necessary as it's been made out to be, depending on the material and the particular part being printed. And of course, there are other ways of getting the same effect. In fact I've found that shining a desk lamp on the powder surface can work just as well. I'm currently looking into adding IR LEDs to the underside of the carriage to see if that works too. These are all things that still need to be explored, and I'm putting out Ester as a development kit so everyone can get in on the fun.