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Thanks for the update Rowland. I have the copper for the cold finger now, but I cannot open your dxf file. Is it possible to get the simple dimensions of the finger in mm? I could work it out by opening up my 450D again but would like to avoid that till necessary because its on the scope this week being used for imaging. Specifically the width of the finger to fit between the contact rows of the sensor board. Also you mentioned 2mm plastic screws attaching the cold finger to the sensor frame (I assume) but why plastic, as internal camera screws on the frame are metal - unless you do not want to earth the finger? Thanks for the development work on this solution.
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