A cheval is done on a frog when a section has suffered major damage or is worn beyond the ability for the frog to function properly. Traditionally, a cheval is performed by planing away original material leaving a flat surface to glue new ebony to.


The following outlines the procedure for a headspline which reinforces a broken head with a thin strip of pernambuco inserted in the opposite direction of the grain in the stick. This type of repair when executed well can last indefinitely and restore many, if not all, the playing characteristics of the bow