Remember, I recommended just a plasma cutter the PowrerPlasma 52i. The duty cycle is better, it has blow back start (less issues) and it has better unit protection and overall design.
The unit you have only has 35% duty cycle on the plasma where as the PowerPlasma 52i has 60% at maximum output.
You ended up with the very cheapest product we sell with the capabilities. With a three year warranty instead of our five year warranty.
Another thing, those 3 year warranty extensions at harbor freight are quite expensive, and increase the cost way past what you spent too.
I'm not saying it should have failed, but when we put a lower warranty on something and recommend a better product that I have confidence, that should leave little room for complaint if and when it does.
We have held up our end of the warranty as promised.