After a few year searching for the best way to transport minimum and versatile studio kit with me, here is the result.
-> being able to transport all the kit in one way from the car , bus , or other transportation on me. Two bag (or only one if I need just three lenses and camera).
-> No need for electricity and having cable around when I don't what will be the condition of the shooting environment
-> be able to take at least 1000 pictures at 1/2 power on Minolta flashes