Stumbled on an extremely interesting thread on impedance measurement with a nanoVNA. Very timely and helpful.

https://groups.io/g/nanovna-users/topic/best_way_to_measure_an/90496878?p=,,,20,0,0,0::recentpostdate/sticky,,,20,0,0,90496878,previd%3D1652402333941281035,nextid%3D1651597237021811471&previd=1652402333941281035&nextid=1651597237021811471