Good, so a P4 backpack will still work I assume?... What about the batteries, are they physically larger (making the battery slots in a backpack not work)?
From what I read from others. Cases/backpacks will still fit the P4pro but ND filters etc will not. Batteries look like a very similar size so they should fit in a p4 backpack battery slots. The RC controller with inbuilt screen however may not fold up small enough to fit?