I understand what you are going for. And I present the following problem with it.
Dahlen A is put to unconscious. While A is unconscious memories are completely copied to unconscious body B. Dahlen B is woken up. Your scenario is fulfilled, Dahlen B has entirely the memories of being put to sleep in body A and waking up in body B. Dahlen B examines his memories and sees no gap in his existence other than the "normal" one of the anesthesis to render Dahlen A unconscious. Your desires for a transfer scenario are fulfilled!
Scenario 1: Dahlen A is killed while unconscious and body disposed of. Nothing ever interferes with the perception of Dahlen A and everyone around that there has been a transfer of consciousness from Dahlen A to Dahlen B.
Scenario 2: A few days later Dahlen A is woken up. Dahlen A of course has the sense of continuous consciousness just as he would if he had undergone a gall bladder surgery. Dahlen A and Dahlen B are brought together with other friends of Dahlen. Dahlen A is introspectively sure that he is the "real" Dahlen and no transfer ever took place. Dahlen B is introspectively sure that he is the "real" Dahlen and that a transfer did take place.
Your scenario assumes that there can be only one Dahlen. That the essence of Dahlen is a unique thing in the universe, and that it cannot be copied so that there are two. I think this assumption is false. I think if you make a "good enough" copy of Dahlen that you will have two essences of Dahlen, and that at no point does a single essence of Dahlen exist, and move from one body to another.
Further, if I am right and the essence of Dahlen can be copied, multiplied, and each possessor of a copy has the complete introspective property of seeing that it is in fact Dahlen, then it is unscientific to think that in the absence of copying, that your day to day existence is anything more than this. That each day you wake up, each moment you experience, your "continuity" is something you experience subjectively as a current state due to your examination of your memories. More important, your continuity is NOT something "real," not something which either other observers, or even yourself and your copies introspecting from within the brain of Dahlen A, B, C etc. can ever distinguish from "real" continuity vs just the sense of continuity which follows from a good quality memory copy.
That there is a single essence of Dahlen which normally stays in one body, but which can be moved from one body to another, or into a machine, I believe is a false assumption, and that it is falsified by these thought experiments. As much as you and I might like to believe there is an essential continuity which we preserve as long as we stay alive, a rational examination of how we experience that continuity shows that it is not a real continuity, that copies could be created which would experience that continuity in as real a sense as the original whether or not the original is kept around.
By this reasoning, isn't it okay to kill someone (or at least to kill them in their sleep)? After all, if everyone's life is a constant sequence of different entities, what you're killing would have ceased existing anyway. You're just preventing a new entity from coming into existence. But preventing a new entity from coming into existence isn't murder, even if the new entity resembles a previous one.
This thread is for asking any questions that might seem obvious, tangential, silly or what-have-you. Don't be shy, everyone has holes in their knowledge, though the fewer and the smaller we can make them, the better.
Please be respectful of other people's admitting ignorance and don't mock them for it, as they're doing a noble thing.
To any future monthly posters of SQ threads, please remember to add the "stupid_questions" tag.