trim tab question

[pogden]

I've been looking at trim tabs and brackets now for about a year. One thing I've noticed is that all the brackets I've seen don't appear to extend out to the far edge of the boat(about a foot narrower than the boat). This is where most of the trim tabs are placed.
It seems like you could get more flotation if the brackets were designed to go to the edge.
If this was the case, could trim tabs be mounted on the back of the bracket?
I've got a idea about a bracket that I think I'm going to try and build this spring/summer. I've got a Stainless Marine bracket that I will use as a base/and a mount for the motor(so I know it won't fall off LOL). Attached to that will be an aluminum frame covered with luan/glass/epoxy and filled with flotation foam. The bracket will follow the exact outline of the back/bottom of the boat. It may even extend a little past the engine mount for added flotation. With that I may not even need tabs, but if I do I may try to mount those at the rear of the bracket. Any thoughts or do you think I'm crazy.