Our dogs spend more time than any backseat passengers in the H3, as they did when we had the Montero. I did a rear-seat mod on it to make dog travel easier on all of us.
Having made a great improvement in traveling with the Goldens, as well as increasing storage capacity, I decided to do the same on the H3.
Rear-seat removal is straight forward, remove the bottoms from their easily accessible mounts, and then the backs. The 60/40 seat back is mounted on a sub-frame that keeps the backs aligned and rigid. With everything out, this is what's left.
I removed the seat-backs from the sub-frame and reinstalled it. There are two spring loaded doors integrated into the transition that kept debris from falling in between the seats and the cargo area. I though these might be nice to maintain an access to the underside of the platform.
I then made stanchions out of off-the-shelf fencing hardware from Lowe's, four of which were shaped to measure from the floor to just above the six-gallon water tanks that I'll be stowing beneath the deck.
Once I hammered them into the shape and length needed, I fastened them to the floor using the H3 hardware that held the seat-bottoms in place. I also determined to rotate the front stanchions 90 degrees to decrease forward flexing of the brace.
With everything lined up, I marked the mounting holes on the plywood and drilled them out.
I rounded the opposite edges on the deck and then covered it in gray interior carpeting, using Gorilla glue and a staple gun. I then installed the deck, bolting it onto the stanchions.
I'm going to add one additional stanchion at the front of the deck in the middle for more rigidity.