Gah! I suffered through this last year with the Black Queen. It was made worse with the Trisonics, body mounted and no great way to adjust up or down.
Lots of measuring, checking, rechecking, measuring, at almost every stage. I'm not sure I was ever 100% confident until it was strung up and I was playing it.
It also has a pretty strong neck angle (can't remember how much), but isn't really an ergonomic issue.