
Hello rico,
Honestsly, I didn't dive very deep into injection magic yet for I'm using pre injection models mainly.
I personally would simply try to add some more empty channels (numbered up) to the related bodypart in a text editor, and see if it works (try and error, that's my approach

, that's how I learned all I know).
Backup the original, obviously.
If I find the time, I'll check this later.