VERY nice Felix !  Especially the blue. 

So if i understand correctly you can replace one of your LED displays and substitute it for a high voltage display and have it working synchronically with the rest of the high voltage displays ??

The reason i ask is that PINLED states that their displays need to replace all 5 high voltage displays, remove the high voltage fuse and they work on low voltage. However they state that one CAN NOT be substituted with a high voltage display.  ALL or none basically !