Brown note upgrade for bassoon

 Sure, a bassoon can play pretty low, but maybe we could make it even lower.  Like, intestine-rattlingly low.  I designed a low A1 extension for my bassoon in Fusion 360 and printed it with my Ender 3.  Should work on any other bassoon with a 38 mm bell.  Here's a pic of the result:

And here's the bad boy in action:

Since it doesn't add any additional keywork, Bb1 can no longer be played with the extension in place, but thems the breaks, folks.  If you'd like to print it yourself, here's the file on Thingiverse:

https://www.thingiverse.com/thing:4900915