Just wanted to put in my 2p!
Love the sculpts that you did, think they're a brilliant representation of what you're trying to achieve, and also (obviously) am dying to know your casting procedure, think it's worked out brilliantly!
Well, thanks to Ric at #warhammer40k on quakenet, I managed to get a pretty decent image of my master. i've since corrected the "cross-eyed" look, and also tidied up the scabby sword...
http://www.goldendragon.nildram.co.uk/wh40k/DSCI0048a.jpg