Here's what it looks like now.
The gearing is a little tougher than I'd thought.
46x16 (or is it 15) freewheel makes it a bit tough to get over the hills to campus from town. The fixed cog is one smaller than the freewheel. I haven't dared to go to down on that yet. I don't think I'd make it back up. The small hills are pretty tough on that ratio.
I like the build though. The single speed is a blast to ride around.