I made a cardboard box with a hole in the side and stuck a heat gun in that hole. Then put a cutting board inside to act as a 'diffuser' by creating a separate compartment in the box so the heat wasn't blowing directly on the ball. Then I stuck a thermometer through the cardboard and adjusted the temp by lifting the lid of the box until I could maintain about 130*. Worked well but only ever used it a handful of times
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