Daniel Loeb may be spinning his Honeywell International story a bit too far. The activist investor wants the $100 billion conglomerate to hive off its aerospace unit. That could be an option, but Loeb’s pitch that it would boost shareholder value by $20 billion is a stretch. Aerospace is Honeywell’s largest business, accounting for around 37 percent of the company’s $39 billion of revenue last year. But the unit’s sales have on average grown at just 0.6 percent annually over the past five years, according to Credit Suisse. Loeb says this is why Honeywell trades at 18.5 times estimated earnings