About this 3D model

My last hot end.Temperatures were taken with a thermocouple in direct contact with the inside of the nozzle.The temperature measured at the end of the threaded M6 rod, stabilises at 46°C above the room temperature when the hot end is kept at 250°C.I had to set the temperature at 273°C in order to reach 250°C.But I used the distribution table for the thermistor.