Every project here is an independent answer to a different flight problem, but they share parts. The same flight-controller hardware runs Corvus, Vitruvius, and Sagitta. The compliant bamboo flexure that drives Ornitos's wings turns up — in miniature — as the elevon hinge in Sagitta's trailing edge. Corvus's folding-rotor mechanism is the same hinge family as Sagitta's stowed pusher.
This is not an accident. The workshop is small, and our standard response to a new problem is "what do we already have that fits?" The result is a family of four flyers that look different in the air and share an internal vocabulary on the bench.