Seriously, it is a 2 second check once you get in your stand and nock your arrow to double check and make sure the blades are locked (seated) into the o-ring all the way. If they are they will NOT come open on your draw or in flight, EVER.

When I used fixed bladesI would double check them once I got into the standto make surethey were tight to the arrow and no bladeswere loose on the ferrule. It takes 2 seconds to make sure!