Does anyone know offhand what the actual auger tube size specification is for grills that use a 1.5" auger? This is for a homemade grill project I'm working on. What I have so far is that it is Drawn Over Mandrel (DOM) tubing which has no internal weld visible. It is either 42mm x 1.5mm, 43mm x 2mm or 1 5/8" x .049" outer diameter x wall thickness.