I've been tinkering with DIY solutions ever since I bought the ds-120, and I've finally created something I'm happy with. It solves the problem of accidentally getting sheet music wet or noticing a wet spot without realizing it. I use it by folding a tissue and putting it inside. This is the improved second-generation version of the spit guard, with the contact area increased for improved hold. It fits the loose, square-tapered shape of the yds-120. Thank you for looking.