Yea, I have already tried with one pack (I should have stated that).
It was still doing the same with one pack. Ive raised the vertical gain to maximum of 190, I might try 200, but this seems pretty high already.
Regarding the weight, almost all of DJI's videos I've seen it looks like they are using 2 packs. Now weather or not they are the same 5000mah that im using, im guessing they would still weigh about the same. This video in particular looks almost idenical to my setup in terms of battery size and placement...