One of the ball screws was bent and unusable. I had to return and pay for shipping. I don't understand why I should have to pay for the delivery of defective goods, especially since half of that amount went for "machining". In terms of quality, I have to assume that these are only cheap China CCs. without actual specifications, so buyers beware. They use Soft SS to rent them so cheap and there doesn't seem to be an understanding that the 'straightness' of a prop is important. You can find the same screws much cheaper elsewhere. I was hoping they would at least be of the best quality and well packaged.
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