Just finished doing 14kg+ over a couple of days through my K10 heat NOT a problem especially when compared to the slow Schomer inspired DRM grinders I have that need to run for 18 seconds per double instead of 4.6 with the K10. My 2 DRMs by comparison did light duty this time around and the grinders and grinds were just warm at most while the year before they were tripping the thermal overloads for the same job.
The point he makes about the large retained ground coffee is quite correct and there is a chute mod to help reduce this (not done to mine yet). This ground coffee I purge through if it is left for to long
So for home use chute mod http://www.home-barista.com/grinders...%20chute%20mod* figure out how much to purge if left for a while and ignore the heat it wont be a problem. If you dont want the K10 I bid $2 :)