I have 15 of those. No conversion. Just patching and basing. They are ready to be primed and painted.
I recently purchased a Chaos Decimator for my Khorne daemon army. It's been assembled and magnetized, but I still need to "Khornify" it.
I also made the spotlight and smoke launchers option as a magnet add-on in case I want one in a game. :P
It's still a work in progress...