FWIW,ULA made me a custom CDT with removeable belt,hoop frame,and load lifters.You could essentially have the same pack in their Ohm 2.0 if you removed the belt and hoop etc but I like the narrower and deeper side pockets.
Might not be for everybody but mine fits like it was tailor made compared to the Circuit that I have.My total load for this custom pack is about 25 - 26 pounds with enough food for 4 days,fuel,liter of water.It will accomodate a BV 500 on top but I have not carried one that way yet.