Ok, further testing in a few days ;)
At this stage I can only supect that for some reason the patching is not working.
But I tried it with FastActivate and some other tools and can confirm the file is being modified.
The patched NC I uploaded was created with the DSA tool so it is a complete different approach but I can not promise that a Carminat will accept the changes.
It could also be possible that your device refuses to use the NC on the SD but uses the internal memory instead.