Congrats on the seat, you will love it!
Hope you didn't get the planted bases, in many cases they do not sit level. Wedge engineering is the preferred base from Status. My Ring seat has good clearance from the door panel, the Ring GT just hits it slightly.
The resistor fix for the airbag only works if you have drivers seat only. The passenger seat requires the resistor and the weight sensor. There is a thread on here where someone is attempting to make a fix for the weight sensor, nothing yet though.
Height is indeed higher than stock, noticably. Good info on the Brode FO rails, I didn't order them as I wasn't sure they would work with the Ring/Ring GT. Looking at the Wedge Engineering brackets, there is not much height to be gained there without a serious redesign. Perhaps the Status side brackets could have one more hole drilled lower which would bring the seats even with stock height.
The FIA certification is for the FRP seats only IIRC, which is a shame as the carbon and carbon Kevlar ones really are the way to go.