Many defective ku-ch'in are sent to Lin for "emergency treatment," including those by the famous Hong Kong hewer Tsoi Fok-geh and mainland ch'in which have good materials but poor workmanship.
不少出了毛病的古琴，也常會送來請他診治，即使香港最有名的蔡福記製古琴，或大陸質好而工不佳的琴，也常送往林立正這兒「急救」。