Just for your info. I have had around twenty batches under my belt in the last couple years. My set up is a 12 gal kettle, gravity fed fly sparge cooler mash tun 5-6 gallon batch system. My question was mash temp. I usually mash at 153-155 On most my brews. If I want more body do I go lower or higher in the mash tun. I haven't really played much with mash temps. I sparge at 177 after a hour. My efficentcy is about 78-82%. I use wlp001 yeast in a lot of my ales. I'm wondering if it's the yeast that's giving me really crisp dry finished or the mash temps. I've brewed IPA,American hefeweizen,imperial Browns. 8 weeks in on my first lager now. And a imperial Russian in the fermenter now.