The seat bracket supports the tall riser quite well and the model support is quite stabil. I may add more braces as time passes and I learn. I call this a model because I didn't know how to do the job. Finally made a few decisions while fighting the mosquitoes and I'm surprised that the result seems so strong.

I may build a bulk head where the anchor rope is under the bow deck. Might be large enough to hold safety stuff, ropes, and other accessories that might be needed on the water.
The bracket plate is held with long lag screws. Same thing with the base aluminum angle, it is secured with long lag screws.

As a temporary means to secure the base to the boat, I used pop-rivets through the aluminum angle and into the ribs. Only one in each corner for now as this is a model. Aluminum angle and square tube would have looked more professional, but that can come later if the unit remains solid.
I need to change the slope of the seat by using a wedge under the bracket or taking the bracket off and trimming the 2X8 treated wood.

The high rise stand off is just right so I can stand easily without strain. A lower seat would require a lot of effort and likely a grab rail for support.

I'll put a wood deck against the boat bottom and cover it with carpet.

I think I'll be able to control the Trolling Motor from the standing position.
I thought to get rid of the snake nest wiring, but all I've accomplished is putting in new wire, fuse links, and making a hook up for the battery. Still don't know how I'll secure the battery, but it seems that a piece of 1/4 inch plywood will slide under the rear bench and the tie down bungies will lock things in place.

Now need to purchase new batteries as I neglected the one from the Airstream Safari for too long a period.

More later . . .

Been a while since I posted any progress on my fishing boat, but I have been working on it almost each day. This photo shows the routing of the front anchor rope pulley, the stowed position for the front running light, and the new support for the trolling motor. Due to the shape of the bow brace, the support for the anchor rope pulley took some planning.
Again, this shows the new support for the trolling motor. The original plywood support was rotted beyond use.
The rear anchor rope/pulley was installed to replace a stand-off that I fail to understand. These anchor rope pulley lock the rope from going out due to the pressure of the anchor. A light tug releases the rope and the rope can be retrieved and stowed. I'd like the anchor hanging on the rope to be coated with some type of insulation, but . . .
Same photo twice? Well, it was a long day.
The starting battery was supposed to fit under the seat, but it's a few inches too tall unless I cut the handle. This battery is intended to supply clean power to the sonar. Connecting the sonar to the battery powering the trolling motor might give some false signals. A work in progress and some things may work and others may not.