Just been checking in here. One comment I would like to make is regarding your observation on the seat cushion, and another iModelers comment on that. You wrote

the D-9 kit did not include a cushion for the pilot seat.

As I am no expert on 190's I can only guess, but I think the reality is the same as with 109's: the cushion is left out as the parachute is what you sit on, and quite often it is left out as the pilot takes it on before entering the cockpit.

Apart from that small comment from here, it looks very nice all. Great detail and paintjob - well done!