That looks absolutely gorgeous Alistair, congratulations on completing your build!
I'm in the process of building a 12.5" version of my Serrurier truss design, over here:
http://www.iceinspace.com.au/forum/s...ad.php?t=98823
I'm trying to optimise every piece of it in terms of weight savings, and at this stage overall it looks like I will end up with a 12.5" OTA weighing only the same as my current 10"