Induction Heater from scratch home made

Tired of using a torch so I finally made this for myself. This is the 3rd unit I made but the 1st manual type. I chose this design because it seemed easy to control resonance and output power. And as well it appears to be very well overbuilt and rugged. I have run it 4 hours without over heating. I just hope those IGBTs do not fail anytime soon.
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