You might also be interested in this one
http://www.tulsawalk.com/projects/ob...els/index.html
I priced pvc components and found unusual variety in pricing from different hardware stores. At some the pricing between larger and smaller sizes seemd to be reversed. So shop around.
I am currently considering an alternative.
http://www.iceinspace.com.au/forum/s...ad.php?t=59704