Hah, that looks very similar. Yes I was already suspecting the characters ROMS.
In fact I read all of the EPROMS and only 2 ID succesfully on ROMident so I have a feeling there may even be more problems with them, however the game runs so the program ROMs should be fine even though they don't ID.
In that video he didn't completely fix the board though because it doesn't show any bullets ! Same as mine again

Trying the ROMs I read in MAME would be a fun idea

However gotta put my time in something else now.......