mm for grain crusher - where to start?

[leandrocosta]

I use the 35l Brewzilla, [...] I have had my best result so far using a gap of 1.2mm with moisture conditioned grain. [...]
This experiment was based on a grain bill of ~5kg and a strike water volume of ~20l, which gives a very fluid mash. However, based on experience to date this seems to work best with the Brewzilla.

What is your efficiency with this setup?

 

[Big_Eight]

I haven't used an all in one but one would think that tossing in some rice hulls would go a long ways to alleviate circulation issues.

 

[jambop]

I swear by a gap of 1.6mm using my Gorilla mill. I get a decent efficeincy (80% ish ) and never a problem when sparging .