So here they are- several of these are limited edition or even unreleased, so although they're converted no actual harm was done to the base model and they can, in theory, be returned to their original state!
Deathwatch Tactical Marine, made from an Ultramarines Tyranic War Veteran.
Deathwatch Assault Marine, made from a Games Day exclusive miniature with the Thunder Hammer from the Iron Hands Tactical squad boxed set.
Deathwatch Tactical Marine, made from a Bloodquest Sergeant Tranio miniature (I don't have the left arm, so could never assemble it as intended anyway).
Kill-team leader, made from the webstore exclusive miniature.
Deathwatch Devastator, made with bionic legs and head from the Iron Hands Tactical Squad boxed set.