CSS trill playback

For users of the much-loved Cinematic Studio Strings (which I purchased this Thanksgiving, and am now in the process of auditioning in some of my music), how are you handling trill playback, which CSS triggers only when two notes are played simultaneously (one defining the base note, the other the half- or whole-step)?

Is this doable in Dorico without ugly tricks, or are you just not using that sample, and electing to let Dorico simulate the trill instead? I figured it would take notating a chord (I can hide one of the notes of the chord in the score, right?), but that doesn’t seem to play back.