@andyfierman Hello, I have read the very good tutorial on Libraries and see at the start where it References EELib and indicates that many of the parts in that library can be simulated.  Am I correct to assume that EELib is now "Commonly Library" The Library Symbole appears to be the same. If that library does have componets with Spice simulation data attached how do I identify those parts as I can see no indication anywhere of which ones are suitable for simulation.  Additionally if I am using a component that is not in the Commonly Library but is available from LCSC (in this case a TLV62569) is there any way to identify if the part has Spice simulation data and if none is there a tutorial available explaining how I can either add the data or use a component from TI that supposedly has the Spice data included. As anyone reading this will see I am reqlly floundering around here trying to understand how to simulate a circuit before send it for manufacture by JLCpcb. Hope someone can help. Cheers