OP, excellent read. Thanks for sharing.
I first heard of this story in the early-90's in an issue of "Air & Space". But, it was only a 2-page article and didn't go into near enough detail - glossing over some of the details even the shortened online article had. Still, I was impressed enough with the bravery and the cajones of the crew to even attempt such a feat. And yes, God must've been along as the copilot for parts of it.
One has to remember many early circumnavigation attempts were made with lots of advanced planning, maps, laying out logistics and/or contacts ahead - and some still failed. They had to do all of this on the fly. Each mile they covered was pushing both man and equipment further and harder than both had been pushed before. And, they would almost certainly be S-O-L if something had gone wrong whether over the middle of an ocean or over land.