I have crossed the Rockler's Manhattan kits off my list. (No reflection on Rockler they have always given me good service otherwise. ) I only have purchased a few so it may not be representative, but I have had almost a 100 percent failure rate. I got them thinking they would be a less expensive option in the Sierra style. I experienced transmission looseness and jamming and noise. (None of which I have experienced with other branded kits of this style .) Yesterday passed the limit, just when someone said, "This is a beautiful pen, I want one like that." The clip broke off in their hand. Note a brief awkward pause followed. I am headed back to the Tiawanese made versions. Sometimes saving a few bucks up front is a loss later.
Just my experience.
Just my experience.