Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Set it up properly

Here's how to set it up after you open the box -- extend the stand to its full length, loosen the allen bolt under the cup and push the collar and cup down to about 2 inches above the lowest place it can go, then tighten the allen bolt again. The pole needs to stick out about a foot above the cup so that the trombone doesn't wobble. Took me a second to figure it out... Hope that helps someone.