Thanks for the contribution. I sure will enjoy it.

I had to surch for the dutch translation of the word lofting. In this situation it is "een uitslag maken" We also use this description (before the CAD period) when we make a stair (not the straight ones of course) and for another example also for making routertable profile knives. I wonder if this is also the case in the USA, using the lofting technic for making stairs. 

https://dutchypatterns.com/