No channeling that we have noticed. We do need to look at the grain crush, right now we get it crushed at the local homebrew store. Thinner mash is an interesting idea, may have to look into that.
I have been brewing AG for a little over a year and looking for ways to increase efficiency. One of the things we have discussed is our sparge water temperature. Currently we fly sparge with 170F water, the problem with this is that it doesn't raise the temperature of the grain bed to 170F, it...