I have not picked out a rotary tool yet & thought I would start a thread to see what different rotary tools people are using with this cool CNC machine and how they are attaching them. I started to buy the harbor freight http://www.harborfreight.com/flexible-shaft-grinder-and-carver-40432.html that was mentioned on thingiverse since their was a 20% off an item this weekend, but with the comments on it overheating I decided to pass. Maybe all these types of tools will have some heat buildup running continuously. I saw the designer of this project was using the Foredom flex shaft which is quite a bit more expensive, but if it is a lot more durable it may be worth it in the long run. This place is about the best price I have found for a Foredom so far. http://www.ottofrei.com/Foredom-K.2230-Flex-Shaft-Kit.html
I am not sure if that is the model that Allted is using.
Anyway, I would like to hear what other people are using & how they are hooking them up to this CNC machine. I would really like to spend somewhere in the $100 or less range for this.