Does this compare with people like Alex Henshaw in the 30s?
Single seat , London to Cape Town and back, no ground support crew, no comms.
Just he , in a single seat Mew Gull, an oversized extra oil tank fitted between his legs to beat the oil consumption problem and a truck inner tube filled with water.
Realized after take off that the oil tank between his legs gets extremely hot and later over the Med he realized that his Africa maps were left in the external locker.
He continued.
Now I call that solo.
If you get a chance to read the book, the photo of him being taken out of the cockpit says a lot. Still see it in my minds eye after 30 years.