So, I mentioned to a friend that I'd like to play around with the monster builder some time and update some of the older edition monsters to 4e. He immediately chimed in asking me to update the Kython (3.5e Book of Vile Darkness). I took his challenge and he was extremely pleased with the results.
So here it is, the Kython Slaymaster:
www.4shared.com/document/OTZWp1Xn/Kython...I forgot to say that I wouldn't mind a little input on this, as it's my first custom 4e monster.