Is it possible that instead of second guessing Eric, he probably just wanted an additional margin of safety for fuel for the desired boost level(23lbs) he intended to run?....and just in case he intended to run 25, he could? I'm thinking that's the case in that situation.
In my situation, I'm just chasing down O2's, so I'm not concerned too much with the boost and WOT fuel. The questions I asked were just for my own knowledge.