I purchased an IGO-W to go with my K100 mech mod. It was easy to setup up and it was cheap. Letting my buddies use it, they were advising me to enlarge the two air holes to 1/16 to increase vapor production and flavor..... so I did! Honestly, enlarging BOTH airholes makes every hit to airy and flavor is down to a minimum. I found some stuff at Home Depot called " J AND B WELD. I purchased the one that has the highest temp rating (consists of two tubes, red and black). Now, my question is....."Is this stuff safe to use on an atomizer. It is rated at 550 degrees? I want to close off one of the holes and leave the other one as is 1/16".