Just slide on the top cap and you can use the clamps also without the FS-guide-rail just like any traditional forged clamp.
My clamps came without protective pads on the excenter pad, so they leave imprints on softer wood. So i made my own PLA-pads which fit snugly. You have to heat them to get them on, and they wont come off easily like some original caps do.
Feel free to use the Rhino .3dm file to adjust if they don't fit your printer/settings or for remixes.
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