Ivankooo's Koncovka OvertoneFlute + Extension

An extension of Ivankooo's EXCELLENT Končovka model that includes an extension for making longer flutes. You can print the extension alone or a whole big long flute. This adds a couple of extra notes to the flute's range, and gives it extra curls. The idea is based on the tunings of the končovky available on https://www.fujara.sk/instruments/folkart_slovakia/shepherd_pipes/overtone_flute.htm which have different ranges depending on their length. Girthier flutes pending design?