My first attempt at modeling a replacement Fitbit Flex clasp for my wife required a crazy amount of support and broke almost immediately. Then I tried chopping off a little of the rectangular base so that I could print it on its side. The result prints without support and has yet to break (presumably because the grain of the layers is perpendicular to the stress exerted on the prongs). When the clasp is inserted into the Flex you have to look really closely to see that the base is missing a little slice.