I don't know whether it was the spokes, the nipples, the spoke prep I used for the first time (previously used grease), or what, but I had the absolutely worst luck building a wheelset with lasers. No problem with sapim race, so any more I build I'm going to go back to them. I just thought it'd be cool to do something different, but it's not worth the effort to save, what, 60 grams on a 36h wheelset. At least not to me.