On my vintage DSDP, I found that the drivers seat was 1 1/4" off to the left of being centered to the steering wheel . This offset led to left shoulder discomfort on long drives, as my right elbow could be on the arm rest but my left could not.
The seat position was in part to allow , clearance to the slide flange when the seat was moved to it's full rearward adjustment( I don't know anyone who would require the seat to be back that far for driving.)
Doing some measurements I found that the floor flange of the seat pedestal was wide enough to allow for re-drilling of the mount holes to center the seat to the steering; so I moved the seat.
My chassis the throttle and brake are solid floor mounted , newer chassis with hanging adjustable pedals may have a better seat placement , but the seat position might be worth looking into .