Hi Gerald. I've been having a look at your first reference here. Not ready yet to make a response. I must admit that, even though you think I know a lot, the pre-Markan passion story is a new one on me, so I'm having to do some research. I've found some stuff on the internet. Do you know of anything more detailed?
In the meantime, this following suggestion caught my attention: "a significant new movement of biblical scholarship argues persuasively that some of the gospels were written by the AD 50's". I found this somewhat surprising, as I've never read anyone serious who dates the gospels much earlier than 70 AD. Do you know what he is talking about? Do you have any references?