The first question: How to tease an metrology company?
The second question: How to tease your self at measuring Low ohm resistances?
The essential detail: Teasing this is of you asking for the impossible.
If you ask from others, them to make for your one 1 Milli ohm stepping of decade box 1 ~10 Milli ohm, this is close to mission impossible.
If you ask from your self, him to perform measurements, by using three single resistors 1 Milli ohm its, all of them soldered in series, at this playground you will discover entire amount of challenges involved.
Here is a list of discovered challenges, that a human he has to deal with.
a) Holding of test leads in a steady manner in place.
b) Perform an ideal Zero SHORT. By using two hands for ultimate control at holding the test leads, you are missing a third hand, so this to activate REL/ZERO over the multimeter.
c) Solder point resistance, even this tiny distance of 1mm in metric, this adds at easy another one 1 Milli ohm on top of the measured resistor.
d) Measuring equipment response / stabilization time. By keeping manually your test leads in place for over 30 seconds, so your meter to stabilize, you will feel your hands getting stressed.
If you wait for a complete minute, you will feel a greater stress on your hands.
e) The worst that it can happen, this is of you measuring another low quality Chinese shunt resistor. This is characterized as 3 Milli ohm, due it poor standards, 3 Milli ohm its the staring point, within just 10 seconds, this resistor will climb to 8 Milli ohm, and you will start pulling your own hairs.
While the branded 1 Milli ohm shunt resistors, they are rock steady under measurement, with 5mA source current.
Educational learning, before you start teasing others, you better tease your self first.
Deep understating of measuring challenges, this will help your own brain cells, so your brain to develop experiences.
Its not enough buying a race car, and race car class of tires, if you are unable to drive this thing at it limits.
The best way to do it, this is by discovering of your own limits, and then of what a race car this can do.
Even the very expensive test equipment, with out an experienced operator in the room, they cannot do much.