Hello again Peter,
I am pleased to report that all is running well. I did install the oxygen mod as instructed to work with hsie. On my Erpro run I ran at full speed until the diesels were damaged, then repaired them and finished the patrol. In patrol I did a long submerged run and the oxygen dial ran down and I got the O2 percentage reports.
I have just left port in my VIIB and saved and exited in the North Sea, as family are now arriving for the day.
All the best and thanks for your help.
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