The pipe project was the first of the 3d modeling. I started off with the pipe frame and used commands loft and rebuild to set up the pipe to manipulate it into shape whatever shape i pleased.
By turning points on (F10) I used the commands scale 1d and scale 2d to warp the pipe into various shapes.
Once i was happy with my shape i ran a script over and entered the number of ribs i wanted it to have. (After the exhibition I think the more ribs it has the more appealing the finished pipe looks!)
I drew a 600 x 900 rectangle and laid all my pipe pieces out onto it. This needs to be opened in Illustrator to prepare to cut in the laser cutter.