>>5369300Green part is supposed to be your piraka arm, since I couldn't find it in LDD.
Something like this might work, i think your best bet would be that CCBS piece, since it would make it easier to attach a hand. But really, I think you're making too much work for yourself, and using that piraka arm isn't worth it, there are likely other simpler builds that will look better. Depends on what you're making this for.