I didn't even think of searching just this thread. I did and there are some posts. I will have to go through them.
Thanks for the compliment - I've only been taking moon pics for the last couple of weeks and with the exception of the first picture I took its been either crystal clear out or complete cloud cover. I am going to keep up with it though so more will come.
If anyone is interested here's my "Moon Gallery"
I believe you'll come across previous posts in this thread which mention the kenko 1.4, and if I remember correctly, it works well with this lens. I don't recall if that includes autofocus, or if those using the kenko were just manually focusing. But I do recall it being referred to.
BTW, these lunar photos of yours are outstanding. Have you been able to capture any with nearby clouds?