: I tried doing this for about three hours. I managed to get about half way
: down until I remembered to pick up an overshield, somehow I forgot that!

I'm thinking that you could do without it in this alcove method though.

: I had to use a second Warthog to push the first one through the opening.

That's what I used to do, but as you probably saw in my set-up demo (BCM530), you can actually squeeze through at speed. You had trouble with that?