You'll want a good sturdy drill Padraic.
I've a pretty decent mains Bosch, that I run at full power to crush.
I've only crushed for up to 30L brewlength and I'm aware of the drill getting very hot.
My cheap drill does not cut it so I grind manually. 4kg or so in 15 mins or less.
I did leave my modification in place so I can either attach a drill if I get a better one, or use the handle.
"padraic":20696ypi wrote: As I'm moving to 80L batches soon[/quote:20696ypi]
You're gonna need a licence for that size![/quote:20696ypi]
Don't worry I drink a lot <!-- s:) --><img src="{SMILIES_PATH}/icon_smile.gif" alt="" title="Smile" /><!-- s:) -->