It’s unlikely that user damage / misuse would be covered under any warranty.
@big_greg That’s exactly what I’m saying too. Nor would I WANT it covered by warranty; it would necessarily raise the prices even more, and I guess I have a more steady hand than most. Buy 2 for the price of 1 (discounted) and take your chances, or pay a > 100% markup for routing an 8 oz package from overseas (assuming you mount & setup cartridges yourself). I’ll take my chances but realize others have a different calculation :)