Originally Posted by SingleSpeeDemon
I've had good luck in using a Shimano BMX freewheel and leaving the rest alone. Maybe I'm lucky--chainline be damned!
Me too. There are a few cheap things you can do to move the front or rear one way or the other though. On the rear, screw a bottom bracket nut (same threads, free from your LBS) on before your BMX freewheel, thereby moving it out a few mm. On the front, if you have a double crank, you can put the chainring on the inside or outside of the crank.