[csx700?]

bbrown
i believe you are right in your post. in looking at the above diagram this would be my guess to. when i ordered my car i specifically ordered the girling calipers (see the photos in my gallery of the car being assembled at "sai" and a photo of the order / build sheet) as a option. the uprights "sai" has provided me are some sort of welded up sheet steel. the uprights are NOT kirkham's.