So a few months ago I saw a deal on Amazon for a cheap Coleman's extreme cooler, catch was it was 70 quarts..... I plan on doing 5 gallon batches, but I am afraid that my cooler is too big.... I know you don't want the grain to compact that much, but you also do not want it to be too thin.... Should I downgrade on the cooler and go with something more in the 40 quart range?