I just used segvan to find 3Jjjjj8466bZXCFJQGDk1reaAXwrri39Vz, 3AAaAAMy2auJ1c5wCRj7Qbzx8qshh9cVrx and 3FffFFLntXU14ePkYK3pyASx2Smaw5TfF1

Unfortunately I had to build from master instead of the sipa_grind branch so I think I'm missing out on the huge performance improvements. Is the sipa_grind meant to be working right now?