Custom Violin maker & repair services. John Importuno is a Liutiao Master Violin maker in Tampa, Florida. Electric violins are custom made by John in Tampa, Florida.Each Importuno Violin is hand-crafted from the finest aged European tone woods such as select Spruce and highly figured and well-seasoned Maple. The hand-crafted varnish is based on Old World recipes and made from Baltic Amber which is oil based and uses several different resins to add luster and life to his instruments.