This must be the scariest thing I’ve done yet! Drilling straight into a wooden clarinet body is stressful. This one is just practice, but if we imagine a crack from the C trill key’s tone hole to the tenon, we would want to insert a carbon fiber pin into the body to bring back stability and ensure the crack won’t progress. Drilling the hole was the hardest part:
After that I inserted the pin with the help of some superglue, and filled in the remaining hole with a mix of more superglue and grenadilla dust.
Sanding down the remaining glue was kind of magical. At some point when the sandpaper grit is in the 1000’s, it stops having the appearance of sanding and starts to look like polishing!
Dettloff Music and Repair 
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