I am going to be shortly getting a G0704 and from what I have seen, a 4" vise seems a good size. In looking around, I found that Shars seems to offer 3 different flavors: the standard 4", the 440V, and what they call a Super Lock CNC vise. The 440V is a little more than I would like to spend since this is a part time hobby for me, but I was wondering if anyone had the CNC vise and if so, how it performs. I only use a mill maybe a few hours a month, and I don't work to super tight tolerances, as most of the stuff I make is to go with my woodworking, which is my main hobby. Any thoughts would be greatly appreciated.