We've been doing the brew in a bag thing now for 3-4 brews and im pleased with the results thus far. The one thing im not sure about though is when i check the temp of the mash should i check the water (the outside of the bag) or the grains in the bag? Being that the grains are condensed the temp tends to be on the low side. So far we have been checking the temp on the outside of the bag and i make sure to stir the bag every so often. Seems to be working. Thoughts?