Lamzdeliai and twisted off of the wood. The blowing end is closed off with a stopper made from the wood, with one side cut off. At the place where the stopper ends, a whistle hole is cut into the bark, and one end of the hole is bent slightly inwards. Three to six finger holes are cut in the pipe. Wooden pipes are made of ash or linden wood. The bark is removed, and the instrument is hollowed out by burning, drilling or carving. The blowing hole, whistle hole and finger holes are made in the same way as for the
Low whistle produce a metal replica and Finbar and himself spent many hours in the shed at the back of Bernard's house in Rugby, designing, testing and ultimately perfecting the flute. The first few were named the Furey/Overton flute but when Bernard gave up his job to hand make them full-time, they decided to market them as The Overton Flute. The first resulting instrument was essentially an oversized tin whistle made of copper pipe with a wooden plug but was quickly replaced by the aluminium one. While Overton was unsatisfied with its performance, he subsequently refined the design with an all-aluminium construction,