Throughout 1956, most members of the lab were assembling and tuning the equipment, and "pure scientists" Hoerni and Noyce carried out individual applied research.[20] Shockley refused to hire technical staff, believing that his scientists should be able to handle all technological processes.[33] After resettlement, he focused on fine-tuning Shockley diodes for mass production, and five employees, led by Noyce, continued the work on a field effect transistor for Beckman Instruments.[34] Shockley refused to work on bipolar transistors, which later was proven a strategic mistake.