Check for electrical isolation of the bottom stages of the tower. We can see that the stages shows electrical short, but there is no detector channel to chassis short.
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Went ahead with the current setup and taped down the thermometer wire using Kapton tape at two spots on the side close to the still rod as well as the other side where it can possible touch the 100 mK can.
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Install 100mK shield and the heat sinks. Removed copper tape close to the still rod completely.
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Will install the 4K stage and start with SQUETs assembly soon.