@SteKulov I am using a Mac and the LTSpice UI is unrecognizable compared to Windows :( Seems CTRL-L is the only way to get a log on Mac version. Thank you for the unit clarification. The schematic I screen captured was in fact milli, but I tried several other Ohm values as well. 50mOhm just happened to be where I through my hands up and said "I dunno".

Thanks @aconcernedcitizen. I did try several resistances, 50mOhm just happened to be where I gave up trying. I will add the CESR subckt for completeness.

@SteKulov This is amazing! I was looking through the menus for a log and didn't see anything. Probably should have googled that one. Thank you for taking some time to look at this.

Wouldn't the negative spike be on the rising edge?

Good to know. I assumed the synthesis tool would have thrown an error. I guess that would be too convenient.

Take a look at Samtec. They usually have great documentation on this type of plug. I will say make sure the right pitch is selected for your application. ie 0.1" or 1mm can be overlooked sometimes. They are obviously not the same.