1981, Adrian established his own company called J. Adrian Cook Pipe Organ Builders, specializing in the restoration of historic
instruments, tuning and maintenance, action design [suspended tracker action], designing winding systems for special circumstances,
and worked closely with the authorities of many churches on their own special needs.
In 1986, the company was awarded
the contract to rebuild the famous Foster and Andrews tracker organ located in the Church of St. Peter Croft, where, incidentally,
Lewis Carroll did most of his early work, including "Alice in Wonderland".