The Maver QR accessories can all be removed from the leg knuckle with a simple clamp allowing you to leave just the knukle on your box leg and also swap items within the range.
They all feature a multi fit knuckle that will fit 25mm, 30mm and 36mm round legs.
This handy keepnet arm is really usefull as it allows the brass thread to be removed when weighing in without removing the bracket.