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I verified that the caps were at around 145v, and falling slowly due to some leaking. Then as soon as I gave it some throttle, the mosfets were failed shorted. Maybe I should do an experiment with some exotic solder that melts 140 degC or something. Maybe they don't like the thermal shock of going from 20degC to "really hot" to 20degC in like 5 or 6 seconds.
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