rotary quern specifications

[Flavius Promotus]

Fratres, is there somebody who can provide me with sketches and/or images of a Roman army rotary quern (= handmill)? Our group has a huge one made by a group in the Rhineland, which is very effective, but weighs a solid 40 kgs! Our cook would be happy if he could get a smaller one for his own, but he would need specifications.

The Junkelmann group used a rather small one in 1985, and I've seen a very similar quern in the camp of the Opladen guys.

Any help would be kindly appreciated

Florian