Does your Native American Flute over blow Too Easily? Fine tuning your Singingtree flute

This tool is key and an easy way to make subtle changes in tone to your flute. This isn’t to change the pitch of your flute( make it more sharp or flat), but is an essential tool to fine tuning for clarity and adjusting the overblown on the bottom note.
I recommend this on Singingtree flutes only as other makers might have different properties that might have a different result from filing like this..