I've tried different rovners and ligatures on my runyon custom alto but nothing compares to my string which I cut off an old clarinet pull-through swab. The lig helps the low notes to be less stuffy and sound is more full and blows easy. I just wrap it around the middle of the reed and then tie a piece underneath one of the folds and pull it tight. But the string and reed gets loose sometimes and I have to fiddle with it.