I built one for gun stuff using a $10 goodwill toaster oven, 10" X 4' duct from home depot and some fiberglass insulation. Drill holes in the top of the oven, flange the duct work to the top with blind rivits. Cover the duct with the insulation I use a thermometer at the top and a rod to suspend the parts inside. Little stuff I place on the rack inside and can bake barreled actions . Been in use for 15 years and does not take up a lot of space. Let me get a picture.
