GEM lowered with 20V from nominal (as in 20250213):
lower gasflow
1 shaper=120ns (=nominal value) 500 events
2 shaper=60ns (value=3) 20 events
3 shaper=60ns (value=3) 100 events
4 shaper=120ns (=nominal value) 328 events - SRU hangs
5 shaper=120ns (=nominal value)  100 events