Not as much as you have done. I like the spikes, sort of a Vlad the Impaler thing. I shaved off the raised chaos symbols on the horses and torsos. I have a bunch of heads converted from Khorne Blood Warriors (the ones wth fanged skull helmets), replacing the bunny ears with various sets of wings and dragon icons. I found a Blood Angel terminator bare head with no techy bits and fangs that I grabbed a couple off too. The first set of 5 are armed with swords, mostly from the battlemage kit. I also converted a Sister of Silence as on of them using her upper half and legs from a Cold One Knight. The second set of 5 will be armed with axes I got from Shapeways that have dragon icons on them. Still figuring out weapons for the third set of 5.