As another reviewer said, Excellent! It was packaged well, everything fitted together perfectly and the finish was to specification. There's even a grease plug in the ball nut (my other nuts from another seller don't have that). I haven't tried it on the car yet - it's included, but at first glance everything is fine. My only complaint is that the bearing in the BF12 is a bit stiffer than it should be. But nothing criminal - let's see how it works.
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