Ponty I don't know if you really would need to insulate it... I thought I would need to but I have been cooking in 20's-100's with great control! no insulation. But I have been thinking about putting in some fire brick, If I could find it cheap.
Name:Dan Other Name:Chop Team: Chop Quey! Smokers:Home Grown "The Tower" 4 UDS, ECB, OTP, Blue Thermo Pen. Harbor Freight Weed Burner lights my fire! ADD a .com to my name and you shall find my blog