How old are your Riedels/Do they show signs of wear?

I have a couple with a small chip on the rim or the base, but others are fine.

How old, though? Could be 15+, or could be mostly new. I just buy a 4-pack or 6-pack when I get low because of breakage and replace like for like. I think the chipped ones may not be originals though, and most of the rest are new (recently reupped)

Mine do. I had a set of eight. Within two years they were all busted.

Yes. I learned that trick here and use it on decanters when needed.