Well, that is, except the anchor system which I may have to play with on vacation.
Here's the cart I put together thanks to a U-tube video: (Don't like the color of the pool noodle I used but that was the only color in the size I needed to slide over 1 inch PVC
A rack I built also thanks to U-tube but I will add four more vertical supports later. Kind of creaky and scary as is. (1.5 inch PVC).
There is an internal place for the transducer and I swapped out my Helix 7 off my big boat, which I can easily move back as I have a transducer on both boats. The sealed battery mounts to a post inside the boat. Mini-downrigger and rod holder like the fish finder are attached to a Scotty base that mounts to the boat with four bolts. I used a piece of starboard plastic to reinforce the mounts on the inside.