It's kind of intresting about the stamps.
I have 5 stamped "X"
2 stamped "KIT"
1 made from Mikov (without kit stamp marking)
2 kit knives without any kit marking ( these 2 have the single type firing spring [that looks similar to aluminum but isn't]) Even though they were kits.
They all feel and fire differently. I have done my own set of tweeking on some of them and have been happy with the results. Some just seem to naturally build better than the others I am guessing after ispecting all of mine. I am sure it takes the touch to make some of these Mikov kits work. They can be very good well made knives. I like mine alot.
I wish the blades could either be a little more "scuff" resistent, or the liners could be a softer type that wont scratch the blade easily if it rubs the inside liner occasionally.
I only have dagger blades on mine so I'm not sure if it's an issue with the clip point blades.
I won't go into the springs