I brewed a helles with wlp833 yesterday.
Thinking about trying brew in a bag soon...
I was cleaning my 10 gallon round mashtun and noticed that the plastic lining was loose and I was able to pull it out of there...makes me think that it's insulating abilities aren't very good anymore. I like the ability to add direct heat to the mashtun with BIAB. Of course, I'd have something on the bottom to keep the bag from being directly on the burner to prevent scorching.