Hi
Here are a few of my attachments on my P13.
Forward flush rod holders using the same holes/screws as the front saddles. I try not to have any attachments sticking out above the deck in case I roll in the surf.
Plier holder is made from a bit of a narrow vaccum cleaner nozle and S/S pliers are secured with a bungie cord loop. I use them all the time to re;move hooks cut traces etc and want them handy but secure.
This is the mark II model wheel. Mark I was welded on too far forward and thus could not house a big enough wheel. It also stuck out and tangled my berley line. The reason for the wheel is that the narrow skeg gets ground through when pulling up a concrete ramp, etc, which creates a leak over time. The wall is only about 4mm thick and since the material is so soft it does not take long before enough has been removed to create a hole.
The new model works a treat and not only prevents the above but also makes pulling up a lot easier. Whats more the design no longer tangles any line that sweeps back. The housing is made from a F&D centre hatch cutout and the wheel is cut from an old cutting board. I have got three wheels from the board which I can replace should one wear out.
This is my transducer mount. Two small lugs weded onto the bottom of the hull in a slight wedge shape. Tab of silicone and the transducer is forced into the wedge and secured with three cable ties over a piece of rubber hose. Will never come off and beats the crap out of all the foam surrounds and adhesives which a lot of people have problems with.
Rainbow

Rainbow