If the sound wasn't right, it would be taken apart and repaired repeatedly, sometimes more than 20 times. Now Lin can get it right in two or three tries. Different kinds of wood may show different types of shape changes which must be carefully considered so that a ch'in will not lose its tone after a year or two.
到現在，也會彈琴的林立正只須改個兩、三次，便可成就一把相當出色的古琴：技巧及音感都臻一定水準，而且對不同木頭在經雕斫後，因結構不同而可能產生的變形也都仔細考量，所以琴不會彈上一兩年便因變形而走音，甚或報廢。