Decking fastened from below...???
I'm rebuilding an old, second-story deck, new everything. I've seen the hidden fastener systems which mate to grooves in the sides of the deck boards and clamp them down to the joists. Another approach I read about in Fine Homebuilding for elevated decks like mine is to simply go below the deck and toe-screw up through the joists, up into the decking (blind). You could probably even get away with coated (not stainless) fasteners.
I can see how this method might be slower for a time-conscious pro, but what might other negatives be?