Yes, he is spot on on almost everything (except the part where he doesn't care about DIY.. and I think he is mystifying his work a bit too much, which is consistent with his business model)
However, sometimes you have to compromise in designs.. I know I did. The pipe is definitely the main issue.
And bigger and fatter, the better.
http://www.iceinspace.com.au/forum/a...e.php?a=130093
http://www.iceinspace.com.au/forum/a...e.php?a=105341