JimG
Western Thunderer
So, at the risk of opening a can of nematodes on Simon's thread, what CAD systems would folk recommend? But please, not one that's going to cost two grand a year!
I use the free version of NanoCAD - a clone of AutoCAD 2D.
Download nanoCAD Free – Professional 2D/3D CAD Software at No Cost
Download nanoCAD Free, a professional-grade CAD software offering comprehensive 2D and 3D design tools with native DWG support. Ideal for engineers and designers seeking a free, reliable solution for creating and editing technical drawings.
When the upgrade prices of AutoCAD LT became almost stratospheric, I moved to Draftsight, an LT clone which was free. But it also changed to a $299/year subscription a year or two ago, and I then found the free version of NanoCAD to use instead. It's not the latest all singing-dancing version, but it retains all the features that I require for my model railway drawing needs.
There are some tutorials around on YouTube - here's one :-
The free version is their Version 5 (the current version is 11

Jim.