My boat is a 1548, and I got a small center console for my boat that is 20" wide X 32" tall and is just the right size for my boat. The console was too short so I built a base for it with a compartment in front of the console for my troll motor battery and it doubles as a seat. That is where I usually put my cooler on when I am by myself. Leaves me lots of room to move around with the cooler on the seat. The size of the base is 20" wide X 25" long. I also added two shelves in the console for some of my goodies. Used an aluminum frame from an old folding chair for the grab rail and also some place to mount the plexiglass windshield I had made for it. I don't use it as a grab rail, I mounted a handle for ease of getting out of the seat. I'm old and decrepit. LOL
The aluminum chair frame is great for making the windshield frame/grab rail. I have use about 3 of them for grab rails now, I don't use it to get in and out, but use it as an aid for walking around to the front and back, great help.
One thing you need to remember, set the console, but don't bolt it down, then you can see how long the the cables need to be. Also, put the steering wheel on the console and stand behind it before you bolt it down to be sure you can stand up and be comfortable. Have enough room on top of the console for GPS and dept finder.
I changed the hinges on the seat in front of the console to open in the opposite direction. Any questions just ask. See pics below.