This month's editorial in Miscellany is asking for more contributions.
For tecchy stuff the field is small. You must be hands on, and not many owners are. Then you need a topic to write about, and finally you need to be able to convey in writing in a way that people can read.
Miscellany articles are around 80% narrative, 20% pics, whereas TM is the other way round. A series of pics with short explanations works better on a forum.
One thing which surprised me when I was slogging away at my book, was that the publishers demand a corporate style of writing, and so what emerged eventually in my book narrative was nothing like the original draft!
Miscellany is not like that!