Hi Mog - The Harrier had no operational need to point the hot nozzles directly at the deck for 20 minutes or more, let alone at the temperature and gas velocity produced by the Osprey. Even when pointed at the deck the Harrier hot nozzle environment is partially offset by the cold nozzles - hence why you could do press-ups without killing the main gear tyres. In comparison, the M/CV-22 had little difficulty eroding & buckling coated steel decks that had been routinely operating AV-8A/B for decades.