Thanks for the input guys!
What do you think about the smaller 47" Osiris?
http://www.3dhobbyshop.com/47-Osiris-BLUE_p_15885.html
Would 5000mAh be too heavy, or can I move it back. If i recall in my 62" Osiris i could adjust the battery location. I flew that on 5S 5000mAh.