Powercoat comes in 240 aswell Steve.As far as I know the powercoat is 110v only. This comes with the skim setup but you can get the guns and pipes to spray render and acrylics which all works fine with any material we have thrown at it.
The ritmo m comes with the render setup but you can by the skim setup and thin coat setup. This is available in 110v and 240v.
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Ritmo M is standard set up for render and backing plasters. The powercoat equipment consists of different pump unit on bottom that can be changed in a minute, thinner pipe and stainless steel spraying gun. With the powercoat equipment you can only use it for skim.
You can also use a larger volume air compressor and texturing gun for spraying thin coat systems.