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Thanks for the update Martin. As you may have guessed by now I've separated out sourcing rail from the Templot Club posts. Your points about resin printers noted. That problem will be resolved when my son moves into his new house. To recap: I can obtain code 60 rail from the 3mm society. Oddly, I found the dimensions for code 60 bullhead from a New Zealand site so I set the dimensions in Templot as Martin describes above. The rail may be wrong, the dimensions may be wrong, but there's enough for me to have a go at this while I continue to source rail based on links in previous posts. I now need to spend time with Templot 3D so I'll report back here with progress. Thanks everyone for all your help.

This is looking promising. Lots of playing with the experimental 3D Templot functions and various sizes of rail. My first goal is to produce a straight piece of track exactly 180mm in length to match the length of a medium TT:120 turnout from a well-known track manufacturer beginning with 'P'. The biggest challenge I now face is explaining to the, er, domestic authorities, is that I need two 3D printers, which will fully occupy the dining room table!

Thanks John, If I come across as I know what I'm talking about then I humbly submit that I haven't really got a clue - I only started looking into this stuff this week so there's a long, long way to go. The good news is that the 3mm society link you provided leads to a spread sheet that lists code 60 bullhead available to members: Spread sheet (Row 39) I'm getting closer, with a few more leads to go, except I have 30-40 tabs open in my browser with about 100 bookmarks so I need to do some sorting and filing already 😀! Martin

John, Is it possible that Peco have gone with code 55 for compatability with Hornby and Tillig set track which are both code 80 I believe. The Peco flexi track is flat-bottom, not bullhead. If I could source some 48 or 55 bullhead then 3D printing from Templot becomes a possibility. I plan on trying the analogue soldering on copper-clad sleepers approach anyway but why not go full digital with a 3D printer? Martin

Thanks for the links F-UnitMad and your very helpful answer, Grovenor.

Hi, I'm returning to the hobby after 40+ years, inspired by the introduction of TT:120. I'd like to experiment with building my own track but I'm struggling to find suppliers of rail. For example: code 48 bullhead rail. I could strip Peco flexi-track but that's code 55 flat-bottomed rail. Is it only possible to buy rail from societies and clubs? Cheers!