I have seen where there are people who make batches smaller than 5 gallon - I have been brewing extracts w/ specialty grains for about 2 yrs now. I was interested in possibly moving into all grain, for the 5 gallon equiv. I would need a 10 gallon cooler, however I do have a 5 gallon, theoretically I should be able to use the smaller cooler for all grain batches and just adjust the quantities for a 5 gallon recipe by a factor of 2, seems logical, but I want to make sure I am not missing anything here. Anyone out there make all grain 2.5 batches who can give a little guidance here?