Cheers Andrew, Alex said he transported it from S.A. on the cheap, the thing weighs a ton. I got a sheet and a half of foam left and thought I'd line the 1.2 meter wall with it rather than toss it. There was far less waste than I thought there'd be.
It's a little daunting when you've cut all the triangles and see just how many there are Malcolm. I've scalled this one back 30% to fit in the back yard, so the edges on my triangles are about 400mm instead of around 600mm as per the plans. That makes it easier for one person to manage while building but it still took 2 of us to lift it and turn it over