Well I spent probably too much time soldering on my first set of headers. In comparison to some of the youtubers who got me interested in soldering - I did a poor job.
I accidentally bought some very thick solder. I spent most of my time wicking it off!
Also, I need to get some blue-tack or something to hold the headers in place.... Hot glue was a poor choice...
(I'm a software guy stop laughing!)
But hey- the connections are electrically sound! So I'm happy with it!