Pictures of seat backs

I'm looking at getting the Classic Aero Aviator or Sport seats. I know the Aviator is its own self contained seat while the Sport is built around the existing seat backs. I've been told the rear hinge part of the seat back is not necessary due to the amount of cushion already in place to prop the pilot forward in the seat. I'm in the process of drilling the seat back angles (F-705J) on the F-705F channel but have been told it may not be necessary. Does anyone have pictures of this area with their seats installed? I'm curious if the F-705F/J/L/K are even necessary with after-market seats.

yes, they maybe necessary. Put them on, you can always pull the hinge pin if you don't want the adjuster.

I have CAD Sportsman seats and had the adjuster plate removed. The guy who did my first flight needed everything more forward than I. Glad I could accommodate him.