Good data point. The main thing I was actually disappointed with when the 320 was released was how complicated it seems to disassemble/reassemble the FCU. At the time, there was like one youtube video of a guy trying to bumble through it, and it seemed like a lot of squinting and holding things just so. It seems so straightforward and simple otherwise...but I get the feeling the FCU prevents it from being Glock-simple in the detail strip and clean department.
Anyone take an armorer's class for this yet? What sort of maintenance does the FCU need, and how hard is it to dis/reassemble the right way?