Hey guys

I am looking at doing some tournaments next year and more than likley ones ran at Warhammer World. Now my question is on Conversions and what they let you use. Is it a case of anything goes along as its in the codex or will they say "no thats not using a Citidel part you cant use it"

Reason is I have stumbled across a company that does conversion parts for 28mm models and they have a lot of cool Pirate Orc heads and bionic arms/legs etc that would be great for Cybork bodies.

So any thoughts or links? Sorry if this is the wrong place didnt really know where to put it as its not a rule directly linked to the game as such.