Just passing along something I learned the hard way this past week. We found a good price on some very nice Bellawood 5/16" engineered flooring late in the Summer, and picked up enough to redo the master BR (270 sf). I had promised my better half it would be done before Xmas, to show it off on the holiday gathering. But you know the drill - firewood, car repairs, more firewood, yada, yada, yada. So with 2 weeks remaining, it's time to begin the job. First, find which place to rent the flooring nailer from. Well, it turns out that 5/16" is a special animal, and most standard nailers can't do something that thin (yep, should have checked on that earlier). After many hours of searching our entire region (up to 1 1/2 hour away), I gave up on finding one. Although someone in the area probably had one of the few nailers that works on 5/16", I was running out of time. So, I sucked it up and hand nailed the whole thing - pre-drilling every single blasted nail (hand nailing this stuff without pre-drilling is not happening). Just another 35 hour job from hell. So, if anyone is considering getting 5/16" flooring, the Bellawood is quality stuff and came out looking great. But see if you can find a nailer first, unless you happen to enjoy spending mega hours crawling around on your hands and knees >:-(