Steadicams of whatever description are specialised pieces of equipment and unless you will be using one on a reqular basis I would consider hiring one out instead whenever the need arises. If you use one in all of your videos they will all start to look the same and you will end up using it as a crutch, it's a bit like overdoing effects or transitions in editing. I would stick to hiring one out when the need arises and stick to handheld and tripod shots.

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Better than a poke in the eye with a pointy stick any day...