A South Florida firm has moved its main operations to Clayton County and is increasing production. Q Gistix will eventually employ up to 150 workers by this time next year, said Mark Sherman, vice president of operations. The company, which repairs and refurbishes electronics, moved into the Southwood Business Park in the Mountain View Opportunity Zone in the northern part of Clayton. Its headquarters will remain in Boynton Beach, Fla. Mark Sherman, vice president of operations at Q Gistix, told Clayton commissioners this week that the company chose Clayton because of its generous incentives which include a $4,000-per-employee tax credit.