Only my 4th day with my TM2 but the pack makes a huge difference! When using the stock CU. I push it in the Ti stem deep 3/8” and only slightly pack. Afterwards I push the CU up above the lip of the stem brush any specks and blow into the mouth piece. Looks like the buildup will happen quickly...
Obviously I was playing about blowing up lol. I was thinking the higher thermal conductivity of the rubies would transfer the heat to the titanium stem like a radiator. But was really what I had on hand from some ball vape builds.