3D printing sleepers

[Chris Odell]

I have been looking into Phosphor Bronze rails, as used by John Jacobs on his various layouts (including the fantastic Kingston Regis)
I am aware that people have previously used PCB strips as sleepers, but I am thinking of going another route, via 3D Printing.
See image of the first attempts of flexi-track sleepers, in the style of Peco mainline and Crazy track options.

I plan to stick them down , paint them and then slide the rails into the chairs. I've got a few ideas on how to attack the points, but any advice welcome.
Just ordered a book from the 2mm association on hand made track which should be helpful.

My main question here though , is that if I am building sleepers from scratch, I may as well make them look like they are made from scratch! ie there is no point in fixing my designs to the Peco dimensions.

I am aware that Tallylyn and Lynton & Barnstable I think had larger sleeper dimensions than is presented by the Peco track. I realise I could just trial and error this to see what I like, which is probably what I will end up doing, but does anyone have dimensions , or images of different styles of sleepers that I can use for inspiration. Thanks.