Rob
For comparison, photos of the same ADR approved frame as supplied by Marty, though bare of upholstery.
And then with a traditional look finish.
My seat frames from Marty were shrunk a little in width, as I'm even more svelte and shorter of frame than Dougie.
From bolster to bolster where the seat meets the back, my seats are 480mm wide. This done to better accommodate the G-Force cabin limitations.