Slash marks are not rests. Stemmed slash marks generally replicate the rhythms being played by the other members of an ensemble. When these other parts incorporate accents, beams, or ties (especially across a bar line), the musicians reading stemmed slash marks in their part need to see and play them. Please add these features. The sooner the better. Without them (and quite possibly others in addition to those few I encountered), producing a score for professional use becomes impossible. Thanks.