Selmer Muse Genuine Double Case

This was included when I purchased a Muse A case. I only used it once to transport the instrument when I bought it, and I am now selling it as I use a Marcus Bonna double case. Please refrain from purchasing if you are concerned about personal storage.

The inside is made of a soft material designed to wrap around your instrument, allowing it to hold various types of instruments. I was able to fit the following in it:

Yamaha SE / Buffet Crampon Festival / Backun Lumiere

How about using it for storing a sub-instrument?