Definitely like the updated guitar better. It’s a better mesh of both images but doesn’t feel forced at all. Looks great!
Is there a way to work in the knob of the bat into this some how? The bat is too subtle (if that’s a thing). Maybe reshape the rectangle below the 3 lines into a knob or make it into negative space in the shape below that. Just an idea. Maybe a stretch but could you turn the three lines/guitar strings into a taped part of a bat somehow? Again, just an idea. I like the idea of a guitar logo without a blatant music themed name, btw.