How to calculate payload of the Steadycam?

[Hayk Frank]

When I read in the specs of any Steadycam that it can hold specific load capacity and let's take as a example AERO 30 which max load capacity is 9KG. That means those 9KG can hold ARM correct? So what about SLED weight? If it's example 4KG I will need to cut 4KG from total 9KG and I will get only 5KG payload available to use with the camera setup? And the same logic goes with all other Steadicams?

[RobinThwaites]

Actually the Aero 30 camera payload limit is 9kg, the arm load is 30lbs (which is why it is called an A-30) which equates to 13.63kg. The Aero 15 will carry a 4.5kg camera but remember that the arm is shorter giving you less vertical travel.