Been keeping myself posted on this thread. Man, such a joke. OP, you have handled this incident much more honorably than I could say for myself. Having had a family member affected by depression, I can tell you it has never reached a point where someone has been wronged by them, you just hate to watch them go through it, feeling helpless. In fact, he has done more "lending of a hand" than most people I know who aren't suffering, even in the midst of their situation. Most of which was not owed or due on their part. It is hard to try and see things through the eyes of someone experiencing such a thing, but I have seen the destruction it can cause someone. How Dustin has chosen to treat this situation you still find yourself in is a whole other scenario, however. The fact that he's not even willing to make it right by refunding the difference of the remaining two knives is a huge red flag if I've ever seen one. That along with the countless knives he's made and orders he's taken in the mean time shows an appalling disregard for personal responsibility on his part. I truly do hope that Dustin finds something or someone that can help him cope with his mental health, and comes around to make things right (even though it's so passed due to say he can completely do so). To claim it as justified under his situation is such a slap in the face to all of those who are currently suffering from depression and anxiety.
Thanks for keeping us posted, OP. Although said so many times before, I really hope Dustin can come through and redeem himself of this debt to make things right.