Draw your shape on a face will help you .

you should post your model for test.

#1 hidden geometry on
#2 select this two edges
#3 in entity info, uncheck soften and smoothed
#4 back edges on
Does the job only for one point of view.

You can simply use the rotate tool to make multiple copies, just find the center of the arc.

#Select the edge(s)
#right-click / entity infos
#check soften smooth or hidden.

Cornel please try another book, I suggest an encyclopedia for a start.

This my attempt as you got V8 so got Outershell.

tubes-corner.skp

Ne pas trop abuser de commande éclater et toujours avoir sous le coude Weld ou/et Recurve.

Info sur l'entité, s'il s'agit d'un arc ou d'un cercle click droit/éclater puis Info sur l'entité donne la longueur de la sélection.

@unknownuser said:

Maybe God hadn't invented spellchecker on his Apple Mac?
At least now we know God made apples but man made Windows

Steve Job created the world, with a little help from Chuck Norris (must admit).

Looking at your avatar nobody could imagine you were so cute at a time.

@Pilou
tu pourrais installer la V8 juste pour convertir les fichiers.
Bon je plaisante, c'est vrai qu'on y pense pas toujours.
Ceci dit j'ai parfois l'impression que la V8 est moins robuste que les précédentes versions.

@unknownuser said:

Ok, so should the architect get credited for his building you created in 3D form on a PC?

Yes. It is his masterpiece, he could hire you for modeling or built it, but it will always be his idea.

The Big Dealer, Peoples opium.

If you create a model of something that didn't already exist you have intellectual property of it.
But if you model something that already exist you don't have any right on it. And you can't show or sell the model without express permission of the inventor.

great job you got!
It would be very instructive to see some close-up of how you wrap the plywood in curves.

@ irwanwr
I prefer screw 1.5:

#1 you are asked to select the first and the second end so you can be very accurate.
#2 you can use it with components

[flash=425,344:1sscqxq4]http://www.youtube.com/v/PLkSufuhWu8[/flash:1sscqxq4]
Credits to http://www.youtube.com/user/jvansynghel

Just try the two versions and tell me back.

Open the file "RoundCorner", copy "RoundCorner-Dir" and Zloader-roundcorner.rb then paste them directly in "Plugins".

Also test this one:http://rhin.crai.archi.fr/rld/download.php?file=screw1_5.rb
very simple and very good.