Piccolo - Inter-Instrument Comparison

We are maintaining a Piccolo here at Henry Ford Hospital (Detroit) as part of our Ebola program and we struggle year after year to achieve decent results when comparing the Liver Panel Plus to the instrument in the main lab (Beckman-Coulter AU). 

Is anyone experiencing the same issues? If so, how is this being addressed (i.e. bias calculation, qualifying statements, etc.).

Thanks for any information!