RE: A NEW KIND OF BUILD THREAD, for those of you . . .
One item I have found invaluable with all of my Dremel's is this drill chuck. I keep it on most of my Dremel's so I can make quick changes of tools.
[link]http://www.dremel.com/en-us/attachments-and-accessories/attachment-accessory-detail.htm?H=188555&G=66442&I=66450[/link]
Ken