I said I would post pics of how I mounted my fishfinder, so here it is. I bought the Eagle 320 at the going out of business sale at Sportsman's Warehouse. My dad has the 168 with the same mounting bracket and transducer and it is just as good. The 320 is color with a couple of extra bells and whistles, and I got it at the same price.
I mounted the fish finder on the deck past the foot well. I usually set it and leave it, but I can slide forward if i need to adjust anything.

The transducer was mounted forward a bit on the inside of the hull. I wanted to get it forward of the scuppers, as shown here, to prevent turbulence from interfering with readings. I cleaned the area with acetone and high grit sandpaper, then made a small puddle of marine goop and placed the transducer in it. This is from before it cured; I put a small weight on it so it would stay straight and not float around. This step will test your creativity.

Not shown, I coiled up the slack and zip tied it to the scupper tube. Items have bounced around some and not knoced the transducer loose.
I took the cap from a broken power/timer unit for landscape lights. I used marine goop again to mount it on a ledge inside the hull. I drilled two small holes in it and use a zip tie to hold the battery in place. The lid is the perfect size for a deer feeder/ alarm battery.

It will keep the battery from sitting in any water that may get in the hull, and holds the battery secure for those windy, choppy days that I always seem to fish in.

This is the view from the cockpit. I like the rod holder handy to where I can troll off either side when paddling, or dead stick a slab or bass assassin while fishing an area.

My tank well will not hold a standard milk crate, but it is designed to hold a 5 gallon bucket (of which I have a couple extra if you are in need). I use the bungies to hold it down, but I am working on a modification that will have a couple of drains in the bucket and a lid for when I fish BTB. I only carry small storage boxes, and the bucket keeps them nicely with a plastics notebook, a net and a few other items. I like the bucket because it is easy to remove and most of my gear is then easy to carry in to put away.

I have a folding anchor (cheap at academy) and 50 feet of rope (for now). I attached the rope to the bottom of the anchor and zip tied the rope to the top eye. If I get hung up the zip tie will break loose and the anchor will be pulled from the folding end allowing it to be pulled free.
I took an oil bottle and use it as an anchor float (yes, I washed it quite well). I drilled a hole in the jug lid and the rope is inside it. I tied a figure 8 in the end of the rope to keep it from coming out.

I pull as much line as I need out and tie a figure 8 on a bight, then use a small beener to attach it to an eye on the gunwhale. I can position it according to the wind and the direction I want to fish. I usually let out all the line just to keep tangles to a minimum and let the float sit on the water. I have had pretty good success with this, so I am not inclined at this point to build an anchor trolly.

Good luck with your rigging projects.