I posted a review of my experience with the Dremel Multimaster on the Dremel site. I heard back within a couple of hours from a customer service rep who proposed a very acceptable solution.
In part, they said: "...we expect the tools to run. Not forever but we do expect them to provide solid use. And our experience has taught us that when a customer purchases our tool, they often do so because they¹re familiar with our brand. They believe in us. The least we can do is stand behind the product."
Nice.