I have a 5 string 35 scale Belman bass (Australian Made). Great bass but the setup needed some tweaking when I got it. I used some articles I found by Roger Sadowsky on setting up a bass and I tink I've done a pretty good job. One thing bothers me though. When recently fine tuning the action, I used a capo at the first fret and found that the bass was much smoother to play than without the capo. It finally dawned on me that the nut may be too high, resulting in a greater distance between the open string height and each fret. I'd love to know how to accurately check whether or not the nut is at the correct height and if not, how to go about adjusting it. The bass is still quite playable, but with the capo at the first fret it was noticeably easier to play. Is there a standard optimal height between the bottom of each string and the first fret? I now see why a zero fret would make a big difference. Thanks.