Koenig 's role is uncertain - he was a very good instrument builder in his own right .
It is also possible that the instruments were built by Courtois at a suggestion or request by Koenig , or the two men may have worked together on the instrument .
Koenig 's role is uncertain - he was a very good instrument builder in his own right , but it is also possible that the instruments were built by Courtois at a suggestion or request by Koenig , or the two men may have worked together on the instrument .