FYI- when I set the sprocket on an axle- I straight edge the drive sprocket to get it close, then I rotate the axle slowly and watch the chain on both sprockets to verify it's riding square on the teeth-I've had to set mine "what looks out-of-alignment" to get the chain true. Watch to see if the chain enters the sprocket on one side of the sprocket and exits the other side of the sprocket, find the neutral point from there- I also listen for the sound of the chain rolling smoothly over the teeth too. You can "hear" a chain that is out-of-alignment & too loose or tight.
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