i will check it out sail. Although i don't do this as a profession because im more into the fabrication side of things Its extremely helpful.
I think to design something is a very rewarding job hey if not more fun than building them .
Its also good to use the computer for once and not annoy people and play video games. Im finally doing something constructive with my spare time !!!
The sketch up seems basic so ill run with it, but cad and advanced programs would be the bomb.
Its good to have a diagram and especially the angles of cut (protractor) . Angles for the gates (316 )(stainless) Have a bit of tig welding coming up !!!!
Shame i didn't fins that 3d stuff earlier. would of taken half the time to build my bitztake for ever to work out. Welding gaps SUCK

Just designing center piece
These programs provide high accuracy I wanted to put that first piece in the cottesloe sculpture by the sea. but i fluffed the intersection angle between the two pyramids ! looks shi1e and unprofessional. been better to draw a 3d model and mkae the cut without gaps.
The biggest failure of building stuff i guess is lack of planning and with these programs spend the time and do it correct ! You can nail it !