I got most of the seat installation done this weekend, but not quite all. I wound up reworking the right-side brackets to stiffen them up. I shortened the one and added a vertical piece to each for strength.
Here is the right side mocked up. I wound up moving it to the rear before finalizing it. That side is done once the paint dries on the brackets; that didn't quite happen in time to finish the install today.
The left side is mostly set up now, though the inside bracket still needs to be strengthened a bit more. Once I get that done I'll be ready to sit in it to determine if I have the location correct. I will also add additional bracing to the front of the seat down to the bracket so it'll be much more rigid than it is here.