1861 Gottfried Scherzer 10 string Magical Guitar

The following is a quote from the owner, Matanya Ophee:

This is a set of plans to enable builders to make authentic replicas of one of the most remarkable instruments ever
made. This is a 10 string guitar, with 6 strings on the fingerboard and 4 additional "theorboed" basses. It was made by
Johann Gottfried Scherzer in 1861. I bought this guitar in 1988 from the famous Russian-Gypsy seven-string player
Sergei Dmitrievich Orekhov (1935-1998). At the time I obtained the guitar, it was equipped with a neck for the Russian
seven-string guitar. There are pictures of Orekhov performing on this instrument on the old Melodiya LP where the
instrument is featured.

These plans are available from his web site: Editionsorphee.com/Plans/scherzer-1.html