My company is looking to purchase the most accurate pressure gauge on the market. We are only using it for testing purposes and don't need to add or remove any refrigerant. It will be used almost entirely for residential ac testing (R-22 and R-410a refrigerants). From the research we've done the Crystal Engineering Corp Digital Gauges boast the highest accuracy levels. Has anyone used this equipment or more importantly does anyone have any complaints about this equipment? We realize we will have to combine this with a manifold system. Any suggestions about the best manifolds are welcome as well.