Thanks to Bill.K for talking me through the posting pic process! As aforementioned, here is my system I had made here in Australia...all primaries are matched lengths and the muffler (as paul notes for his) is supported on the block.
To save posting heaps of pics here, there is a link to the album of the exhaust sytem here:
http://www.netspot4u.com/~manxclub/gallery/album02
Here is the sytem part way through manufacture....