【Herdim】 Contour Line Arching Templates　Set Viola 16", Guadagnini 1798 Viola 16", Guadagnini 1798 　　Contour line back and top arching templates derived digitally from respected instrument patterns. The contour lines start from the 5 mm line, leaving the edgework around the outline on the intent and imagination of the maker. The neighbouring contour lines correspond with the arching height difference of 1 mm. Herdim Instrument Templates Authentic outline templates of respected classical patterns are carefully derived from reliable original sources. The selection of the patterns respects contemporary requirements, the patterns are chosen to have a correct both body and scale length.