In 2008 and 2015 gave a solo concerts at the biggest concert-hall in Beirut, Lebanon, the "Palais de L'UNESCO", under the aegis of the Mid. Eastern Bible Society , directed by Dr. Michel Bassous, and was one of the guests soloists invited by the Armenian government and Mr. Garik Israelian for the 6-hour long '80 years Anniversary Tribute-Concert' in honor of his duduk master, maestro Djivan Gasparyan, in Yerevan-Armenia. Both events were widely broadcast in both countries-regions, respectively. In this same year he had his 'comeback' solo concert in his native Caracas, as a soloist and guest teacher for the '2nd. Caracas International Flute Festival'. Eustache performed the C. Nielsen 'Concerto For Flute & Orchestra', conducted by the young "dynamo" Christian Vasquez and the "Simon Bolivar Youth Symphony Orchestra".