I get my stingers from http://www.pendleslotracing.co.uk/http://www.pendleslotracing.co.uk/
Off load they draw about 300mA but with the discs on MilitANT and CombatANT they draw 2- 3 amps at 12.6V. I have just located and ordered a brushless motor that claims to do 54,000 revs as opposed to the 29,000 of the stinger. It will probably make the robot uncontrollable but I just had to have one to try.