For the 6 minutes that KG doesn't play that the opponent's starting center does, why can't all 14 of our power forwards man the helm? 

Other than Gasol-Bynum on the Lakers, who else could really make us pay?  The Nuggets with Faried/McGee/Mozgov and the Spurs with Duncan/Splitter are the only two I could think of.

So when KG comes off the floor, they'll just roll with two power forwards or a small lineup.