Other than the back brace to the roll bar that isn't there yet, this completes the seat mounts. I added braces to both sides of the front of the seats. I did the right seat also since my son may ride up to the staging lanes in it, and he's a pretty big guy... if he's not careful getting in the way it was he could kink the aluminum seat. In fact I might even brace that one to the roll bar as well, just in case he gets careless plopping down in the seat.
And here they both are installed. I put the Kirkey cover on the left seat to check how I fit in the car with it in. That is a really nice product! I'm very impressed. It's almost too nice; there's enough padding in the seat that I wind up sitting a little higher than I expected. I accounted for that when I set the hight, but there's about 1/4" more padding than I figured on. I think it'll be okay, but I can always build new angled channels to lower it later if needed.
And finally I added a light that will come on when I hit the brakes hard enough to trigger the pressure switch. Because I have nightmares about not quite having the two step engaged when I floor it.