In 1981 Gibson realized that there was a consumer demand for the sound of original PAF pickups. Engineer Tim Shaw designed a pickup that aimed to replicate the early design, reversing changes made in the 1960s and 1970s: a new bobbin without the "T", a correct small square hole back in both bobbins, and Alnico magnets. Shaw's efforts are generally considered to be the first of many recreations of the PAF humbucking pickup. However Gibson did not take Tim Shaw's recommendation to use plain enamel magnet wire due to cost concerns. As a result, Shaw era pickups still use polysol magnet wire.