Between the world of the very rare (and wildly valuable) instruments and the world of mass production repair of 3rd grade Suzuki violins lies a wonderful world of old and interesting instruments. Often these were not particularly valuable when they were new but they were either the property of some fondly remembered relative or some interesting relic bought through Ebay that deserves being restored to playing condition within a modest budget.
The tools involved are sometimes ordinary and sometimes must be designed and handmade to fit the constraints of a particular repair. The stirrup shaped tool here was designed to expand and contract in order to supply internal pressure when regluing a brace under the face of a guitar.
The four basic areas of this work are Regluing , physical Wood Repair, Refinish , and Setup and Adjustment