"bolt on" larger bags for new Sanger V215

Been lurking here for a while and since I'll be taking delivery of the new boat in a couple days figure I'd toss a question out there....

Have a V215 coming and the rear ballasts are a bag setup directly from Sanger, not a hard tank. I figure there has to be a way to remove the existing 250 bags, and simply replace them with larger (ideally 1100's) bags in the stock locations. Obviously the size is what will be restricting me, but I'm not sure how much. From what I see everyone has the hard anks and they have to add to them by adding multiple bags......don't seem to see a lot of these boats rolling around with bags straight from the factory.

Thanks for any light that people can shed on this