Manufacturing employment will likely hold steady in 2013, but many Northern Nevada manufacturers are ready to expand once they see growing demand."We are probably one to two people understaffed, but unless we see the production of the last couple months continue we're not going to hire anybody," says Marc Giovannoni, general manager of Custom Stamping Inc. in Carson City. "The uncertainty is overwhelming."The uncertainty Giovannoni and others see includes the outcome of budget talks in the country's capital, the strength of the recovery in the economy as a whole and in their customer demand specifically. "We do a lot of …