As most of us know, the cz-3d is all over the place when it comes to performance of individual units.
There was a NASA Tom tuned one that sold on ebay recently and when I asked the seller what depth the unit was certified at the answer was the lowest I've seen yet...8.5"
There was a NASA Tom tuned one that sold on ebay recently and when I asked the seller what depth the unit was certified at the answer was the lowest I've seen yet...8.5"