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I’m thinking of doing this for my next retrofit.
Can I just ask what may be a stupid question, but my window has that black patch thing on it with no “gap” for the sensor to look through. Do I need to use a new housing for the sensor and prism or do I use my existing one? If so do I have to scratch off some of the black stuff?
It seems on face value like a simple retrofit but this part I’m not sure on.
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