From what I've gathered a larger diameter roller pulls the grain in and crushes it without shredding the huskes up and this supposedly makes for better filtering and less stuck sparges.
As to whether or not it's worth the extra $ for .5" larger diameter that may be a matter of opinion rather than of fact.
My personnal opinion is that more than anything it's Fred trying to differentiate his mill from Crank n Stien's. But I like Fred and I would buy his mill if I didn't already have one.
Do what you like!
Brew what you like!
Last edited by abracadabra; 05-14-2008 at 04:09 PM.