I've been doing some searching and can't find anything on WWI concept art. Some of Don Figueroa's designs are truly incredible, and I'd like to see some of the other, non-mainstream stuff. Specifically the WWI Shockwave. I've heard about it, but can't find the sketches anywhere. Every time I do a search, I always get a pretty good custom figure in the results, but that's about it. Can anyone help? Thanks in advance!