A welding tip with the thread extended. Note the chewed tip because I didn't hold it tight enough.
The steel heater block with resistors. Normal heatshrink added to insulate the leads
Completed steel block assembly. Takes a while to heat up, reaches 210C without insulation.
Measuring is so much easier with the right tools!
Brass doorstop - perfect sized lump of brass with m6 hole pre-drilled and tapped.
Doorstop cut on o-ring notch - holes added for resistors and thermistor. Half the depth of m6 re-drilled and tapped to m8 - M8 peek insulator rod.
Doorstep heater components