I'v no idea what size wires go on the dynamo, but you do need to wind them both in the same direction if memory serves me right and they could be in series with the brushes. You can probably make the brushes from those that are available as replacements for "Skill Saws" vacuum cleaners or the like, but they should be graphite baased. How's come no instructions came with this puppy? Jesse in Tennessee USA MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.