Here is a way to save all the pages of a thread in pdf file. I chose the most transparent way to do it, a batch file and trustworthy apps.
It could be done more versatile to select pages and with the ability to be used in other forums too, but i don't know if anyone will use it.
Anyway this is for now.
 i added the pdf from the thread

Hi modelers,
i chose to build my bench from drywall steel studs CD 60x27 mm inspired from
http://model-railroad-hobbyist.com/node/21016

“How did you spend your weekend?” asked one friend of mine at the work. “Nothing special, among other things  i was watching videos in the youtube about RR modeling”  I said.  “And?”  he insisted.  I started talking about and I didn’t realise that I was talking more and more passionate about all the nice things I had seen and learnt. A second friend participated and both together encouraged me to talk.

Attached is a libreoffice calc sheet to calculate the actuators behavior depends on the geometry, the material properties , the diameter of the wire and servo rotation, for a common turnout switch.