I recently acquired a gold ball-end Tech from FB Marketplace (see photo). It actually hurt the few times I've used it. I finally noticed the large gap between the cap and base plate. I swapped-in the plate from the razor on the right, and the gap disappears. The ball-end plate is stamped "Pat Nos on Package" on top; the bottom surface reads "Reg US/Pat Off/diamond logo/Made in USA." It also has a pair of thin metal strips/shims running along the top (a feature I've not seen on any other razors), which could account for the gap. The strips appear to be afterthoughts, as though a previous owner added them. Any ideas why someone would do that? I have a supposedly-aggressive Red Tip, and it glides smoothly over my face. But this ball-end razor feels like I'm dragging raw metal across my face.