I play in my church's worship band. Bless their heart, the worship leader tolerates me. We get tunes from a familiar artist in a weird key, like A#/Bb. I'm not gonna learn all those barre chords for an enharmonic key. No sirree. I wanna use my capo, and reverse engineer. I study this artist, and i know he always plays Gmaj. shapes, and look at that, he's capo'ed 3! A#! Bada Bing! No wonder the capo is our friend. Just reverse engineer the tune's chords so they sound like the enharmonic key, while playing familiar shapes with my capo...and a smile....