Based on what you have posted, it appears that you would have handled things through having a friend or associate go to Dave's home and get your MO from him or have this person go to Dave's house and take the knives from Dave's home for shipping to you. You must live in a different world than I do. In my world, no matter what the circumstances, without a court order, you will not be welcome in my house and may get shot if you enter without my consent and refuse to leave. Dave may or may not be incapacitated. When he was well, he was a crazy dude. Read his posts. I would not assume anything.
Bottom line, I'll stick with the stop payment approach...Al