United Technologies buys defense contractor Rockewell Collins in a deal worth $23 billion.  Taylor Muckerman analyzes the deal and shares why UTX is in no danger of getting too big.  Plus, we borrow from our podcast colleagues at Industry Focus and kick off “Mistakes Were Made” week with a few thoughts on listening to smart analysts and listening to your own gut. Thanks to Casper for supporting this episode. Save $50 on a mattress at http://www.casper.com/fool and use the promo code “fool”.