Yongnuo YN560-II + SF18 as mains powered studio flashes

Just modified a (Canon compatible) Yongnuo SF18 battery pack to accept mains power.
Now I can use the cheap YN560-II flashes on mains power.
With my older YN460-II I had to disassemble the flashes and modify them.
With these it's enough to modify the external battery pack.
Pro: I can pull the cable and use them on battery power without powering them off. (e. G. When the cable is in the way or I'm tripping over the cable)