Re-restoring my 18" Atco Standard

Back in 1994-5 I largely restored my Standard. However I then got a job before I'd finished, moved away, my parents moved as well, and my pride and joy was relegated to the back of a damp barn, which didn't do it a lot of good. 

Finally in 2015 I had a house and a shed to keep it in (not the easiest things to keep in rented rooms and flats) and in 2020, in lieu of our spring holiday, I fitted a new coil and got it running again. It's done a few AGMs, but the unfinished state of it has always got my goat. 

So this time I am going to attempt to actually finish the bloody thing, get it running with the appropriate carb for a machine introduced in 1926 (though engine number is 1923), and document the process. 

Hopefully if anyone is interested you'll be able to tolerate my frankly verbose writing style (with regular explanatory brackets). And I'll try to keep the photos coming as the bits get done. 

There will doubtless be many questions in Technical - especially as I tend to think about something for ages, give up, ask, and two minutes after posting have a brainwave.  

Parts that I may or may not need that I already know of:

Oiler(s?)
Atco/Senspray carb (not going to pay Rudge owner money for a Senspray!)
Top rail for the handlebar of the full length for an 18". 

Onto the piccies. I'm forever intrigued by the mix of complex (those bronze eccentrics for tensioning everything) and simple (the modular design) in these machines. Yes, they're common as muck by the standards of century-old petrol mowers, but still pretty interesting.