I have an S5 that managed to burn a chip.  If bitmain honours their warranty and send me a new one, this will be implemented.

This is a reasonable alternative to using aftermarket fans.  The issue I see with aftermarket fans is they may not provide the same CFM air transfer as the stock fan unless mounted in some less than conventional configuration, such as 4x fans set up in a contra-rotating fashion (two per end - soldering fun).
(see https://en.wikipedia.org/wiki/Contra-rotating_propellers)