Suppliers and useful links;
Lucy Coad makes and repairs Square Pianos she also sells Seccotine glue;
"Cardboard rolling stock and how to build it" By E. Rankine Grey
Facsimile edition, downloadable PDF
"Cardboard passenger stock and how to build it" By E. Rankine Gray
Facsimile edition, downloadable PDF
The GANSG or Goods And Not So Goods website, 100's of wagon drawings and lots and lots of info.
They ask people to download the whole site so that it can be used offline in a browser and save their bandwidth
This is the free (software foundation) software to do it WinHTTrack: https://www.httrack.com/
My friend and fellow micro-ist Mike's layouts
The Gauge O Guild
The 7mm Scale Society
Andrew Stadden (The best O Gauge figures)
High Level (I buy the horn blocks from here) (they do not have https security)
Sadly if I put an http link here I will lose my https security certification.
A Google search for High Level Kits will find them.
Where I buy my KB Scale track pins and point levers
Drop down links in Blogger by Tutes Inside
Once learnt this is much easier than using the pages gadget, especially when adding a new page.