Elbows table turned into interactive flash presentation with extra subdivision elbows and references.
I forgot to show a very common problem when modeling: model a well circular open arc, so the images below are posterior but complement the information in this table.
Circular arc methods.
Circular modules put together.
Making arbitrary cylindrical holes is quite hard. Something that Nurbs excel better than Subdivision.
This reveals that when making perpedincular edits, the plane shape will still be kept.
Sizing circles so the subdivision results matches a certain radius (.5 m) in this case.