I've pulled the rear sights From my HW50 , R7 and Hw30 rifles, replacing with apertures on the dovetails. Has anyone purchased aftermarket plug screws to fill the empty holes? If so, what might be the designation? Amazon lists #6-48 and #8-40 blued gun plug screws, all with 1/8" long shafts. These are fairly inexpensive but I don't know if either are compatible with Weihrauch tube holes? I'm sure the rifles would share the same size screws. I can't see ordering either, only to discover that they do not fit. Anyone had experience with this?