Today another Arduino gadget arrived from the US. It is a shield which allows to reduce the stack height of a configuration and use two stacks side by side instead of one. The shield also provides prototyping space for additional components.
I quickly tried it with the current component I have in test and that is the BMS.
For this particular configuration there is no benefit because the height of the stack is not reduced. It is only useful when I remove the screw shield and put the resistor array onto the extender shield. then I can reduce the stack height by one, however in this application it may not be very useful. I just plugged it in to see if there are any compatibility issues, but there are none, so it is good to go when I get a really high stack which would not fit in my project boxes anymore.
I will now continue with some programming for the BMS.