Jim,
Do you find you need them alot? Not even offered as a factory option from FW. I believe FW places them in the space next to the outdrive on the 260. Cant tell from that shot if you have enough room to add some there or not.
Truth be told, I want them more than I need them. With the occasional shifting of passengers around, or advancing throttle to bring the bow down, I do fine. I have looked at that photo Phatboy posted quite a bit, and although it's on a much larger boat, I've almost convinced myself that quite a bit of glass work was done to provide a flat area at planning hull level to mount the trim tabs to. Maybe not, but clearly a lot of glass would have to be added to my hull to do so.