I have to agree with Bitsandkits here. I am glad you are modeling and converting, but I think you should really rethink the look of the weapon. I know you say there are a lot of models with the pole axe, but dual sided ones aren't actually that common, especially ones with chain swords. Right now that weapon makes no sense, and makes the model look a little silly.
If you are looking for ideas, look at the Dark Eldar Incubi and their swords for inspiration on how large swords can be held.
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