Wooden railway Stemfie bridges from BeamBridge

Description

Beam bridge is quite mature bridging system for wooden railway, so I decided to add Stemfie compatibility to it. Generator will be available on BeamBridge main page as soon as it gets finished. But for that I need some opinions from the Stemfie community, Stemfie's Basic block size does not play so well with 40mm of wooden trains (these go well with Lego beams and Seva), I have to either make it narrower at 37.5 (3xBU) or wider at 50 (4xBU). I can also try some of the fractions like 3.25xBU (40.625mm - thats like wooden Thomas) , but I am not very sure such a dimension would play well in the Semfie universe and be better. Reasonable posibilities are available for download. Please let me know in comments or messages what do you think and why. Thread used are from Cantareus Stemfie OpenScad library. Závity jsou z Cantareovy knihovny Stemfie. [More maintained main page of the project including the generator is here](https://www.prusaprinters.org/prints/75624-beambridge-wooden-railway-bridge-system-mostni-sys)