I have the ZSpeed HD-CSC and it has been trouble free. If CZP vouches for this product I wouldn't have any issues going with it.
The ZSpeed CMAK is the product of choice on this forum, but does represent a small design change from what was intended by Nissan, flawed as it may have been. I always prefer to correct the flaw instead of changing the design... That being said, I haven't seen a single negative review on the CMAK and it has been a popular choice for a while now!
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