? about 2nd and 3rd row seats
 

I have the second row seat that is off set to allow entry to the rear seat. It appears they are both the same size with just different frames? I was thinking about just running two seats for the time being and using the 3rd row in place of the second row if the hardware is interchangeable.

Re: ? about 2nd and 3rd row seats
 

Its been a while since i had a Sub with a stock middle seat but im pretty sure the 3rd row mounts to an even surface, the wooden cargo area. The middle row mounts both on the lower floor even with the front seat but the back of that seat sits on the raised rear cargo area. So the front "legs" are longer on the middle seat.

Re: ? about 2nd and 3rd row seats
 

swap the mounts from seat to seat and you'll be good.