Maybe a question to ask is, given that Garn recommends best use of the Garn at supply temperatures of 140F and below, should a Garn even be considered when the primary application is continuous hot water supply above that? Certainly, firing until a desired higher temp is reached and then mixing down is not inconsistent with this, but trying to maintain continuous high temp is quite likely to result in the over-firing corrosion issues. A second question, if coatings are needed, why should this not be part of the implemented design provided by the mfr? Why hasn't the mfr dealt with this issue, rather than placing the 9% risk rate on the consumer? Would a person purchase another very expensive product knowing that she had a 1 out of 11 chance of a failed product unless the person spent considerable additional time and money to make the product safe to use "as intended"?