[tennispro9911]

This may or may not be the right place for this question, but for Transmissions, what are people's opinions on the pros of cons of Polycarbonate vs Delrin vs Aluminum. Those seem to be the most popular materials for transmission construction. We are in a similar position as AndyB, except we also would be able to get material waterjetted, which makes it much easier to use polycarb or Al.