Good point. Thanks for pointing in out! I made a single-sided version of it, but for some reason, that turns out to be more expensive at Eurocircuits ... Their pricing policy seems a bit erratic. But maybe it'll work out cheaper somewhere else?
Thanks again for the input!I tried to tidy up some strange stuff that the auto-router had done (including the bizarre "dance" around the pot), and increased the trace width from 12 to 16 mils (even 24 for 5V, clock and latch). At last I'm starting to figure out how this Eagle thing works (I think) ...I still think the area around the shift register looks a little messy, but I guess it should work.