I just noticed that my Marco Custom has a fret right next to the nut. Can someone explain the reasoning for this? I've been adjusting all my basses and when it came time for the Marco, I noticed the action was quite a bit higher than what I have grown to like. By "higher" I mean the numbers only because by playing it, I would have never expected this. It's really nice and easy to play, which has me a bit stumped. It plays like the action is super low, but in reality, it's a bit high. Is this the result of this bass having a zero fret? Thanks. Happy Holidays.