i would like to add some weight, but there really isnt any room, the engine is located in the center rear with two seats on both sides and the storage isnt big enough for sacs. I did see something new recently where smaller lead sacs have been used.
get the Fly High Side Sacs, put them in the back on each side of the boat, then get a Fly High Rear Seat Sac for the bow, thats like 500 in the back, and 600 in the front.
that might be too much, but you could do a variation of that set up.