Digital Sundial cleansed

Version française plus bas -- French version below
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EDIT : Jan 2nd 2016
As asked, I dully documented and published the OpenSCAD file including my optimization.

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This is a cleansed version of the Digital Sundial by @Mojoptix.
The photo shows only the hours tens part.

I found his idea so great that I plunged into his well written and documented OpenSCAD code to understand how it's done.

Then as @BJoe suggested in comments, I modified the code to remove unnecessary bridges (then reducing after print work) and by the way simplifying the stl file.

The two first pictures show a cross section of the third column of the display of the minutes tens digits (the most complicated one). The first picture show the new (cleansed) file.

The sun paths are exactly the same as in original version. Hence the shadows will be exactly the same. And the contrast will even be b