Here is my 12Link, ran it for a few months and still using brush motor since I want to finished them all before I install SXX Comp on my car ;) currently it is with a QC2 and a DC 6x2 motor. http://ernrc.blogspot.com/2010/03/xray-12link.html
Current rollout is around 38mm and it can run around 8-10 min with 40c 5000mah. I like the car a lot !