implicit VS Round-Anything

There's also ImplicitCAD (https://github.com/Haskell-Things/ImplicitCAD) which produces STLs, as it is designed for CAD. It uses implicit functions, which I believe are similar to SDFs (I believe the idea is not to necessarily correspond to the distance function).

ImplicitCAD is essentially OpenSCAD with bevels.

You might take a look at ImplicitCAD. It accepts OpenSCAD code (as well as some other more exotic formats) and can render much much faster depending on resolution. There's an online editor/renderer here that would tell you whether it can handle your existing code unmodified.

In the vein of "lots of ways to do things", my personal favorite for rounding is Round Anything: https://github.com/Irev-Dev/Round-Anything

I was looking for this recently and found a great OpenSCAD library called RoundAnything. It looks very productive:

https://github.com/Irev-Dev/Round-Anything

And then there is Round Anything: https://github.com/Irev-Dev/Round-Anything

Yes, The tip solves one of the most reoccurring questions about OpenSCAD, How to make chamfer and fillets on extrusions. As for description the code is both commented and names are assigned to indicate their purpose. In combination with the Round-Anything library a good chunk of usually hard modeling becomes real easy.

Back to topic, you might find Round Anything to be useful -- I certainly have. I haven't used it yet, but the shell2d() out of the Belfry OpenScad Library also looks like it would be helpful for these sort of functional parts.

I submit my own library that supposed to help with fillets, can be used for chamfers too. https://github.com/Irev-Dev/Round-Anything