Every string instrument handmade by me is unique. For new buildings and restorations I use mounted over several decades tonewood . For my instruments I use Italian resonance spruce and Bosnian maple . Usually I build by Italian models such as Antonio Stradivari ( golden period ) , Giuseppe Guarneri detto " del Gesu " , Domenico Montagnana , Sanctus Seraphin or Carlo Tononi from Bologna later Venice . There are two categorys of instruments I build. The Master Line and the Bottega or Workshop Line.