I read on Eurobricks that the hinge align tool was broken but that was a couple of updates ago so I'm not sure if that's still the case. I haven't yet been able to make complex hinge connections and I haven't tried for more than two linked. I found that I could create the illusion by placing pieces near one another but only actually making a connection in one place. That's all well and good for a two parter but it puts a cog-like construction well outside the realm of possibility. Maybe someone knows something I don't, though.