I'm new to the hobby but I thought I would post My homemade radiation shield that I made. So far it works really well and keeps the high readings down. I'm using an Acurite 02007 and its less that 1 deg difference from my neighbors Davis station. When I first put the sensor in it the temp didn't go down but after I turned the fan on, the temp went down to the same as my neighbors so it seems to work good. I put a timer on it so the fan shuts off at sunset and turns on at sunrise. I didn't know if the insulation was needed so I can always remove it real easy. I put the red mesh cover on the bottom to keep bugs and etc out of it. Please leave some feedback so I can learn from my mistakes.