~Calibrated to Perfection~
It's a modified version of XennonRays pepakura pattern
http://xenonray.deviantart.com/art/Garrus-Papercraft-Download-263251654
Amalgamating as many pieces as possible, printing them out and cutting them out of horsebox EVA foam
Then just going for it
After four different versions of the pod section I had something workable (see video: https://www.youtube.com/watch?v=X9kO_JZGiPY)
Man I wish I was neater -__-
The wonderful mask was made by Adam Hurst :)
The costume is also sponsored in part by http://www.elwirecraft.co.uk/ :)
I also decided to make an M8 Avenger rifle (from nothing to full rifle in 3-4 days). I was going to make a sniper rifle too, I even patterned it out but there was nooo time to start it let alone finish it XD