The key to happy Dremel ownership is to buy the over-priced POS when you don't need it for a specific project. Buy all the stupid attachments at the same time-the Ryobi version are cheaper. Then throw it in your tool chest and forget it. If you buy it for a specific job it won't work for that job and you'll be pissed you spent the money. But, if you have it, you'll find that it is just perfect for a job every couple of years or so, and you'll throw it back in the box happy you had it.
I know this because I bought mine in 1984 and have used it, maybe, a dozen times. And it DID do a credible job of cutting out the pilot bearing on a Mazda RX-7 flywheel. The other eleven times were those classic cases where I had no idea how I was going to accomplish something and suddenly remembered the over-priced POS. It didn't always work, but at least it's easier to find in the tool chest than an electrical three prong to two prong adapter.(g)
“Scientists are people who build the Brooklyn Bridge and then buy it.”
Wm. F. Buckley, Jr.