OK I hope to have solved the problem for 4.10.
I re-wrote the aerial mine class for 4.10 (too many changes in 4.12 from 4.10 in key methods - it was necessary to go the same way once again from the torpedo.class, but this time taking the 4.10 torpedo.class as a basis.)
Gabriel, Max, Slipper or whoever is ready to volunteer, can you give this a try:
https://www.mediafire.com/download/wcek1zz8g8px1p9/_AMines410test.7zDesactivate your current AerialMines and AerialMinesDemoPlanes folders and install this folder instead
(Do not forget to disactivate the entries you made in the air.ini for these planes)
Then choose the He111H6 - it will offer a LMA_I mine among its weapons choices (the last one)
Can you test it and see what happens? especially when it explodes at the passage of a ship or when the He111 carrier plane crashes in water (I cannot test this in the old 4.10 install I have still on one of my hard disks as it has a bug and crashes when an actor dies).
as 4.12 in its current form is useless for night fighting.
Slipper, why do you say that? If you have a 4.2 install what's the problem?