There are some photos buried in Dave and Terry from Espressoparts flickr. *Looks like they have just put the mini E funnel on the robur, etc. *Finally!
Fans are probably a good idea, but if youre doing serious volume, it makes sense to just get three phase wired in. I have heard of a few places running so much coffee through their robur that the heat makes the burr carrier swell and lock into place so that the grind cant be adjusted! That said, my moneys on the friction from grinding being the dominant contributor to heat.