Double oboe stand

This thing is derived from the oboe stand I posted a few days ago. By refining the design a little, and adding one more component (a joiner), it becomes a stand for two instruments. These will usually be oboe and cor anglais, but they could be almost anything that fits on.
It comes to pieces for travelling, and can be assembled without the joiner to make a smaller single stand, when needed for crowded pit orchestras for example.
By printing extra parts, this stand could be extended to take 3 or more instruments. That might be useful in Bach's Matthew Passion! An oboe d'amoré also fits on.