Attention Battery Rebuilders! ToolkitRC M6D Chargers anyone?

Hi all previously asked this question in historic battery threads but it never gained much attention so decided to start my own thread.

So I purchased a few ToolkitRC M6D chargers but having problems with runaway charge, they are just not cutting out, ever. I went for these because they are tiny and capable of 15a discharge rate in recycle mode, attractive proposal!

Downloaded and installed the latest firmware, cables are 14awg turnigy silicone 250mm long, current settings are 4 amp charge and the lowest selectable "nixx peak" setting of 5Mv but they just keep charging to the moon and blowing modules up until the relief valves pop, btw im only testing with low capacity junk modules and very well aware of the impact on modules charging to this point, I have done extensive testing over the last decade with my old chargers but I want to make a nice new test station with maybe 14 channels to get things done more efficiently

One thing that's not clear to me about these chargers is if the selectable peak (5Mv to 15Mv ) is per cell or for the complete module, i don't want to give up on them but meh its getting pretty annoying at this stage.

Has anyone else had a go at these little beauties yet?