Is not a Dremel is a Proxxon with a Keyless Chuck,
http://www.woodcraft.com/product/2083960/36613/proxxon-precision-rotary-tool-fbs-115e-model-38472.aspx
My most productive time is in winter, as I have most of the time, sleep, go fishing and build 50-100 new baits.
The rest of the year I work 11-12 hours a day and on weekends I go fishing.