I own a bicycle shop and have had a very hard time locating something with a stem clamp diam. of 26.0mm.
Adjustable stems are very common now and perfectly safe if adjusted properly.
Thanks again, and please be nice to each other not everyone knows as much about bicycles as you do. Don't know about re-engineering or reliability,but can't imagine they would be being sold if there was a real issue. Oh, THAT kind of stem. I thought they took those things off the market long time ago, considering their safety record. My apology for upsetting you so by not reading the original posting more closely.