Yesterday I received an order of 3 GDE's and they seemed different from the one I had. I measure them and while both have 3/4'' chambers, the new ones have 3/16'' bowl wall at widest point, the first one is 1/4''. I wonder, is MM getting bigger cobs now? The first one I got came from an online retailer, these 3 straight from MM. Does that mean anything? Tho still in breaking in stage, they smoke like champs.