No, not sarcasm. But poor wording, perhaps. What I meant was generic 'you,' not @sloar personally.

As in "You never can have enough fresh rim strips." Or "You can't say anything these days without someone taking it wrong." I apologize; I could have caught that and edited it if I'd read it after posting.

And the donut thing works. I (personally) was once too lazy to run across the street to the LBS to buy a new strip for a build I was doing, so I cut a patch out of an old tube to cover up the 4 inches of missing strip around the valve hole on one wheel. Completely forgot about it until 3 years later when I finally replaced the old worn out tires. In other words, it worked at least as well as a new rim strip, and saved me a hundred steps and $2. And maybe 5 minutes?