Nice pens Ex. Buzzzz, they mech is the same as PSI's Vertex (or so they claim) I have no reason to doubt this since I am using one as my daily, since my vertex "disappeared" I bought the sampler to try out the various finishes and turned myself the black enamal with a black and dark blue blank (thanks exotics), the second (gold one) seems just a little rough and scratchy when operating (I checked the nib end hole, the clearance around the button, and the spring, ( still not sure what the issue is)). And the chrome went to a coworker that gave me a bunch on brazilian (sp?) cherry flooring that he had left over.