That is absolutely amazing! I would totally pay somebody to make me a Kha'Zix costume with at least HALF of the skill you have. I'd ask if you could make me one, but I'm saving up on money for a trip to Europe. So instead I'll ask: HOW did you make that? Could you possibly post instructions on how to make an epic (Mecha or Classic) Kha'Zix cosplay?
I am in the process of making a tutorial similar to the Blitz and Tank for Kha'Zix. I have a powerpoint, with pictures only right now (no dialogue) that show some of the build process. If your interested drop me your e-mail in a message!