juan,
welcome you've found the biggest flaw with the x-5 x-4 hull there planeing design with more the minimum weight.
i sold nitros untill this past year and most of my customers with these hulls had similar complaints the prop is the correct one according to the tracker rigging specs thou you may elect a stainless version. 115 optimax calls for a 13 1/4 x 20 laser 2 stainless.
the best solution has been as you sugested of putting the trolling batteries in the rod boxes, loading your boat with heavier items in the front storage areas and the lighter ones in the compartments in back of the seating area.
the consesis form those that have done this already is Quote"now the boat preforms like i had orgilany hoped it would"
this seems almost verbatum from each one of the several and was made the suggestion status qo for the salesmen at our location with this hull prior to putting a new customer into this rig.
i hope this helps? the move of the batteries is pretty simple and straight forward , you'll have to strap them down to the blkhead that seperates the rod box from the center compartment, as this is the only way to secure them and the only surface you can put any type of fastner thru.
i think you will agree it is the only logical step my service manager was pulling out his hair with the first few we upgraded to 24 volt trolling motors but now he has it down to a science.
good luck and welcome aboard! joe
oh yea what the heck is a "zander":huh: