I had the EXACT same issue when I started trimming my kit and sent pics to 850 right away. To their credit, they responded in less than 5 min and pointed me to the album on their FB page that has a step by step guide, and it helped a lot. Also, if you look up "James' Death Trooper Build" he also just put up a series of pictures showing his build as well - he did things slightly different, but the end result was the same.
Good luck!