Sorry for the late reply, I'm ill at the moment. I don't seem to have the pics on my phone, other than these attached for some reason.
As for details I can quickly give the following
I would be more than happy to answer and questions or take pics of any certain area to help others.
The build was my first cosplay costume I attempted for the london anime gaming convention in 2015.
I started of using the brilliant foam files from I think jpf?
I used Eva foam matting as the base material. And then thermo plastic bandages for stiffening the foam.
I partly made the backpack to the template then free handed it into the choas version.
The knee joints are made from the plastic joints found in certain sports injury supports.
I tried to use ducting to give the leg joints the space marine feel. But they don't work brilliantly.
The shoulder pads rotate independently from the arm and use a wheel castor as the base.
The inside of the chest has 15mm flexible plumbing pipe as support.
The chest has 2 fans in, one to suck in air and the other to blow air out.
The eyes in the helmet were made from glow specs.
I 3d modelled the chapter badge and belt buckle and used my 3d printer to produce them
Again sorry for poor quality of this post. I will tidy it up once I'm 100%