The thighs are directly over the cut-out portion of the Center Spar Carry-Thru. Note: trim knob with slots for holding the trim position. Rudder pushrod above the trim.
Excellent view of Center Spare Carry-Thru with supporting angles and Center Spar Attach Strip. End of Upper Spar Cap visible. Angle under cushion and it's counter-part sandwich the spar plate. Cushion was light weight and comfortable ... excellent ... Dennis should tell us the construction