Three month update: Last friday while cleaning my boiler I noticed hair-line cracks, no bubble, on the surface of the newly designed burnpot so this burnpot was not the answer to the burnpot issues. Today, I called Harman, asking what the plan was now. The person I talked to confirmed that the engineers at Harman are still working on a solution to the burnpot issue, explaining to me how important it is to keep the holes in the burnpot surface clean, basicly trying to pass the buck to me not keeping the holes clean. I mentioned to him this wasn't the case because I clean the burnpot weekly including the holes. When I asked as to what material the burnpot was made he told me stainless steel, I asked what grade, he didn't know. I did mention to him that to my knowledge, no grade of stainless steel has a heat resistant value high enough to withstand the heat created in the combustion area of these boilers, mentioning maybe to try using alloy 600 for the burning surface of the burnpot. His response was that it might be cost prohibited to do so to which I responded, if the metal alloy that is used for the burning surface of these burnpots doesn't have a heat resistant value higher than the temps created in the combustion area, the burnpots are going to continue to fail.