Absolutely amazing job, Spry!
I think one of the most difficult things to do is find the parts/pieces to match a piece of concept art or character sketches and your work here is superb. (I think I caught a couple of GIJoe blaster rifle pieces being use in the tripod?) I love Stefan's work and your recent work on your Apocalypse theme just matches up with his painting so well.
You two make a terrific team! Congrats on a great piece!