The Steadyrig Sliver spring arm is a good first time arm as it is easy to work with and field service.
It has a range of 13lbs to 63lbs and comes with its own adjustment tool.
The original CP models I, II, III, IIIA & EFP arms are beautifully designed from an engineering point of view. They are a tried and tested work horse and a true credit to their creators. They have been used for many years by satisfied operators and are known around the world as being a reliable well functioning piece of equipment.