NMO Comp/instr: Header fixes. Plus suppresion of mcdisplay. #25

Job	Run time
windows-latest.msmpi.python-3.12	11m 4s
macos-latest.mpich.python-3.12	6m 29s
macos-latest.openmpi.python-3.12	5m 39s
ubuntu-latest.mpich.python-3.12	12m 50s
ubuntu-latest.openmpi.python-3.12	13m 33s
	49m 35s

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